Wind Power Energy

Betty asks…

If you were to choose a subject for a poster what would you choose?

So i’m doing this poster for school and the teacher gave us 5 options to choose from: Wind power, Biomass energy, Hydro power, Geothermal energy or Solar power. I’m not sure what to chose could you give me some answers of what to choose?
We are discussing about global warming and these are some ways to change it.

Windmill Farms answers:

Hi Lara. We have been powering our home for 11 years now with the wind and sun. There are also solar water preheaters, rainwater collection tanks and a wood stove in the living room and shop. For the past 6 years or so, I’ve been going to the local schools and teaching seminars on solar power, and in some cases, the schools have run bus loads of kids out to our place to see a home like this first hand. One thing I’ve learned over the years is almost everyone asks questions about wind turbines first. There is something about them, the way they move, the noise people imagine when they see even a picture of one that draws their attention.

Wind power is actually a bit of work. The machines are mounted in very inaccessible places, they have moving parts that break down, they can make unwanted noise, and anyone within a quarter mile has to see the thing, yet everyone wants to learn more. Pictures of solar panels are cool, but they never move or even change color when they run. Pictures of a biomass operation sound absolutely ugly. Probably the wood stove would be the best of them. If it were me, and you wanted to draw attention with your poster, go with wind. Look online for interesting pictures of turbines, particularly in unusual places, like a remote artic weather station, next to a camping tent, on a sailboat or a mountain. A really good eye catcher is a big one with a technician hanging on the side of the tower in a harness working on the turbine. That really gives you a great idea how large the units can be. I’ll list some places you can look for photos, and information you can add to the poster. Good luck Lara, and take care, Rudydoo

Mary asks…

where should solar energy, wind power, and geothermal energy systems be located on a farm?

Please give a brief description of where each of these should be located on a farm and why.

Solar energy system:

Wind Power system:

Geothermal Energy system:


Windmill Farms answers:

Often solar panels are placed on a roof. If it is on the main house it will also keep the house cooler and electrical wiring lines will be shorter. But if they are on the ground it will be easier to keep the panels clean. In either place it should not be shaded.

A wind power system should be as high as possible and away from trees and buildings that might obstruct the flow of air, but you would not want to locate it so far away that electric lines pose too much resistance.

A geothermal system can be built in many different ways. If there is a pond nearby that is deep enough using this for the ground loops is the cheapest method. Trenches can be dug and a long loop system installed or most commonly two wells can be drilled and water will be pumped from one go through the system and be deposited in another well. The equipment that uses the loop will be located within the house.

Jenny asks…

How does energy production using wind energy compare to other sources?

How does the energy production using wind energy compare to other sources? (such as solar, geo thermal, ect.)
Also, i need a diagram or picture to show how the energy is produced using wind energy

Windmill Farms answers:

A diagram of wind energy would show the sun heating air, air flowing from hot to cold areas and a wind turbine collecting some of the power.

A diagram of coal power would show the sun shining on a forest, the forest dying and being buried, the buried forest being mined as coal and burned at a power plant.

A diagram of hydro power would show the sun shining on a sea, the water evaporating forming clouds which rain over land forming rivers that flow and hydro dams generating power from that flow

A diagram of geothermal power would be a cross section of the Earth showing a hot interior, pipes going down to collect the heat bringing heated water or rather steam up to a generation plant.

Winds blow more at night than during the day so contrary to popular belief, wind power is not available throughout the entire day and since energy demand is the highest during the day, wind power isn’t particularly useful as it’s only available when people don’t need it. Both wind and solar energy are not available on demand so standby power facilities that use natural gas must be available to step in when the wind fades or a cloud passes by so there is a limit of how much of our energy can be solar or wind without adding additional fossil fueled power plants which we hope not to use. With wind and solar, you not only pay for the wind and solar energy generation but also for the fossil fuels energy generation to be held in reserve.

Ken asks…

what other ways are there to create energy without using fossil fuels and minerals?

some of the ways i know how to save energy are:
land fill gases used for energy
wind power
solar power
wave energy
are there any others? what are they?

Windmill Farms answers:

I think biofuels could be an effective way to produce energy…but not the kind derived from corn (which actually has a net energy production of zero, considering the energy needed to plant, harvest, fertilize, etc. Outweighs the energy of the produced ethanol). I’m talking about using either a) food/organic waste (which can be decomposed in anoxic conditions to produce methane via bacterial decay, much like landfill gas), or by using algae, which can essentially grow in a slimy brine pit if needed, or in the ocean, and actually would be carbon-neutral (since the carbon released in combustion was already removed by them in growth).

Essentially anything that contains heat, moves, contains high energy chemical bonds, etc., can theoretically be harnessed to produce energy. For example, your body heat, the heat of the Earth [geothermal], nuclear fission reactions which produce heat as a byproduct, or solar heating, which involves heat absorbed via sunlight, are all thermal sources of energy. Things that move, which have kinetic energy, are the wind, tides in the ocean, waterfalls, etc. Things that can be burned/oxidized, such as fossil fuels and the sugars we eat every day to keep us alive, also contain energy. This is only a small sample of things that could be used, if you use your imagination.

From physics, energy is neither created nor destroyed, but simply transferred from one form to another…the problem is in harnessing the energy as it changes forms (efficiency). Any of the above forms of energy can ultimately be turned into electricity through motors or generators (which convert energies into useful forms, like electricity).

By the way, landfill gas is essentially methane, and is actually a hydrocarbon (like fossil fuels) that is only carbon neutral if the material being decomposed in the landfill recently extracted CO2 from the atmosphere (i.e. Not a fossil fuel).

George asks…

How long more will normal life on earth be possible?

Our oil reserves are depleting fast and how long more can the economies and normal life last when oil reserves run dry? What can we use after this? Go back to wood/charcoal? Then all the trees will be cut down before regrowths are achieved and cause a major reduction in oxygen supplies. Nuclear energy is still very dangerous to handle and risky. Solar energy is seasonal and not all day long. Wind power is marginal energy, not always there to charge up huge banks of batteries. Marine wave power is not sufficient and depends on the tides. Countries with high mountains and hydro electric power will be saved from this doom as long as there is water in the lakes and reservoirs to run them. Maybe we all go back to the good old horse and buggy days again in no time at all.

Windmill Farms answers:

You call this NORMAL?????
Remember, a big problem before the automobile was horse droppings. The ‘good ol’ days’ were never all that good! Fortunately, there ARE answers. Clean ethanol fuels, wind, solar, and geothermal energy are all viable, as is wave power generation. That doesn’t even touch the more esoteric power supplies like aether and zero point power. This is not the end. It is not even the end of the beginning.

But the system as it is will indeed collapse soon. I don’t give it 6 months. (I DO hope I’m wrong!)

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Vertical Wind Turbine Design

Jenny asks…

Why are the blades on turbines not much wider (more surface area)?

As a non-mechanical engineer is not that obvious to me, but if we look at design of sails and commercial aircraft wings, bigger surface area means more power or more lift. Why is this larger area power gain concept not applied to the design of wind turbines? Including vertical turbines which seem to have even thinner blades.

Windmill Farms answers:

Needs a much bigger force (wind) to move it.
Can’t rely on a 20 mph wind, better to harness a 5 mph wind.

But please, make an effort to give ME a thumbs down because you like to.

Daniel asks…

Do you think the Maglev Wind Turbine will ever become a reality?
Phil, I disagree with both of your statements. First of all, the first video IS a turbine. I don’t know what definition of ‘turbine‘ you are using, but I assure you it is not correct.

Secondly, watch this video to see that this shape for wind turbines is not inefficient as you say.

Windmill Farms answers:

There’s been many vertical-axis wind turbines (VAWTs) proposed over the last 40 years; yet, very few designs made it past the model/ theory stage for practical reasons. The web site for Mag Lev doesn’t describe any large or commercial size systems; but, some Chinese folks said in July, 2007 they wanted to build one. Its impossible to review objectively the installed costs they show per MW size output. Obviously, the friction losses for typical VAWTs causes much of the energy losses for them, in addition to the 10- 35% efficiency losses for drive trains and electrical generation equipment. The Tree Hugger site re: this theory added this comment:

“It would be more accurate to say that these turbines use magnetic bearings, as the term Mag Lev, implies magnetic levitation. So they are standard VAWT that use magnetic bearings to improve efficiency by reducing friction”. January 21, 2008 11:23 AM

Its been over 18 months since their youtube video and little else that’s concrete seem available; so, these seem theory, not reality.

Lizzie asks…

where i can find the detail design and drawings for vertical windmill power generation?

I want to make a windmill power generation for domestic use. I want to find the detialed drawings for a vertical windmill power generation tower.

Windmill Farms answers:

VAWT (vertical axis wind turbines) designs are around, checking the patent database might be your best bet, the TMA one is there. But just because they have a patent doesn’t mean that it works or works as well as they claim.

Many people simplify the discussion to one of windswept area (size of turbine) to shaft power, and claim they have the greatest efficency but the real issue is cost to construct to watts, with factors to be included in the cost such as longevity, and storm surviveablity. I myself am a wind energy researcher (as well as lot’s of other things) and find the TMA claims to be unlikely.

If you are looking for a nice simple design to build and learn from,
check out

they used a conventional auto alternator that caused them some grief, using a photovoltaic charge controler might have gotten them a lot more juice. They also chose simplicity to construct, but could have chosen a harder to build “wing” that might have given them almost twice the energy out.

Good Luck
remember that most great discoveries come from people who submerge themselves in all the available information, then get a good nites sleep

Sharon asks…

Do you have wind turbines going up all around you?

Would like some pros and cons on these turbines. Thanks.

Windmill Farms answers:

Wind turbines will be a major source of energy in the future. The turbines in use now seem huge, but the future ones can be twice as big as well as much smaller. A major breakthrough in design has occurred. The blade of the turbine will soon be like a circular vertical blind, hanging down from the top of 40 story buildings. The load bearings will be ‘mag-lev’ and friction free. This will reduce the maintenance and lubrication costs, and increase output per wind speed. They say that 1 of the large M-L WT units will equal 1,000 of the big statdard wind turbines. They say…

Here is a pic:
:-D The links are just what I Googled for. I am not sure that they are more than advertisements.

Expect these to be seen wherever cities are that have wind and can afford to put them up.

Pros: Much cheaper and cleaner than other sources of energy. Less noise and eye pollution, and safer to operate than the propeller style wind turbines. Small versions can use the wind from passing vehicles to power street lights. Will use wind from any direction without having to turn into the wind.

Cons: Large and unusual structures with attending power lines. Dependence on the wind for output. Some noise, although less that the propeller type of turbine..


William asks…

how can i make small wind turbine blades or rotor easily? that work in small amount of wind?

i copied one of the net but there isnt enough wind

Windmill Farms answers:

There are a number of small wind turbines you can work with that are designed for low wind speeds. The key to remember
when working with low wind speeds for horizontal or propeller type you need a broad short blades, like a pin- wheel. The blade angle to the wind should average about 45 degrees and not exceed 3 to 5 blades if they join at the hub.

The wind turbine design I prefer to work with are vertical axis articulating blade cycloturbine. The main characteristic is you need the blades to be light weight in vertical axis designs. The benefit is that they are more sensitive to light winds. The detriment is that to a degree they are not as efficient, (28-36% for vertical axis and 38% to 42% for horizontal axis) and some designs will not produce power through their entire rotation.

Good Luck,

Dave Cooke

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Is Wind Power Green Outline

Sandy asks…

What to do about global warming?

The harmful effects of global warming are being felt “here and now and in your backyard,” a groundbreaking US government report on climate change has warned.

“Climate change is happening now, it is not something that will happen decades or centuries in the future,” Jerry Melillo of the Marine Biological Laboratory in Massachusetts, one of the lead authors of the report, told AFP.

Climate change, which the report blames largely on human-induced emissions of heat-trapping gases, “is under way in the United States and projected to grow,” said the report by the US Global Change Research Program, a grouping of a dozen government agencies and the White House.

The report is the first on climate change since President Barack Obama took office and outlines in plain, non-scientific terms how global warming has resulted in an increase of extreme weather such as the powerful heatwave that swept Europe in 2003, claiming tens of thousands of lives.

Hurricanes have become fiercer as they gather greater strength over oceans warmed by climate change.

Global warming impacts everything from water supplies to energy, farming to health. And those impacts are expected to increase, according to the report titled “Global Change Impacts in the United States.”

Areas of the country that already had high levels of rain or snowfall have seen increases in precipitation because of climate change, says the report, which focuses on the United States but also tackles global climate change issues.

Windmill Farms answers:

Skepticisms were often raised by others to the authenticity of GHG as purported culprit to global warming, ergo variations on solar radiation and Earth’s orbit to the Sun were often brought up as maybe a plausible reason. Those who claim these however cannot quantify their claim’s technical effect to global warming vis-a-vis its scientific explanation, i.’e. Its net heat variance and impact to global temperature. If these claims and observations can be supported by scientific research and technical data and collaborated by the scientific community, then we have no more qualms on these as rational indicators.

Now first, we must understand what causes global warming and how it impacts our climate. In stark contrast with the above paragraph, we will base our evaluation from several indicators with scientific references and evidences. There was a recent assessment report from UN, the IPCCC AR4 (Fourth Assessment Report), concluded that drastic increase in green house gases (GHG) in the atmosphere, which currently measures at 379+ ppm, is directly proporational to rising global surface temperature, sea level and melting ice caps. No other variable can be scientifically attributed to the latter except the severe upswing of CO2 GHG since this phenomenon reflects infrared rays back to earth in a ‘green house effect’ that consequently translates increases in world temperature and thus, changes in our climate. Still others say it’s the increases in water vapor, but it is more of an effect that aggravates the phenom rather than the cause.

GHG normally comes from biosphere and hydrosphere in several natural cycles, but this recent drastic increase as measured today, comes from anthrophogenic or man-made emissions with most of the CO2 variance coming from fossil fuel use. Earth had accumulated fossils since 300 million years ago and was only in the recent years that the burning of fossils had generated approx 30 billion tons of CO2 since 1950. We can’t do around without it simply because fossil use is the main component of our global energy requirement (approx 85%). We soo need energy, that’s why our only alternative is to burn fossils but always with that collateral damage of increased GHG. Now, the ever increasing growth in global population and the upswing of science and technology are even more translated to craving for more energy. With our requirement increasing, the more we need to burn fossils & the more will GHG increase. If unabated, we will soon expect severe changes in our climate in years to come, unless of course we change to these changes…

So what to do about global warming? I will suggest a 2-prong approach in mitigating global warming on collective global/national effort and individually, targetting both the supply and demand for energy. On national level, let us source our country’s energy as much as possible from renewable resources, i.e. Biofuels, hydro, wind, solar, geothermal, tidal and ocean waves, biomass, and with carbon free alternative energy on limited nuclear power plants. There exist very huge untapped energy potential in renewables and if harnessed, these will displaced a substantial niche in crude oil, coal-fired plants and gas powered plants which constitute almost 85% of global energy requirement. By limiting the demand for energy as a function of increased population, the need for a rational population management must be implemented by all countries. Better yet, convening an ‘International Convention on Global Population Management’ as ratified by all countries, will limit the upswing of world population, while at the same time effectively controlling and preserving our finite natural resources, that will curtail if not lessen our global energy needs. In controlling carbon emissions, Kyoto Protocol is an effective precedent, and as a vital means to control energy use, an ‘International Convention on Global Energy Cap’ must also be convened with a Controlling Rate on ‘Total Energy / Total Population’ or Energy Usage per Person, as ratified by all nations around the world, with ‘power/energy credit trading’ facilitated among poor and usage-undercapped nations while pursuing renewables and promoting sustainable development. On individual effort, our need and demand for electricity and transpo fuel forces the power/fuel companies and multinationals to produce for more. It’s all about economics and gaining money from apparent opportunities without due regard to environmental impacts. To effectively lessen CO2 on an individual initiative, we have to keep in mind that the means to attain certain goals must be benchmarked on lesser carbonprints rather than on higher economic gains. We have to lessen our personal energy needs, we have to be rational in using our car, lights and other power eating equipments. Switch on appliances only when direly needed. Go on mass transport or car pool. Plant more trees that sequester more CO2 for oxygen tradeoff. Prevent those who cut the plants and the trees. Encourage others for green revolution and reforestation. Save the forest and stop buying products produced from trees or plants by companies that doesnt do environmental and forest mgmt. Implement an effective waste mgmt, for emissions from biomass constitutes secondary GHG.

All you have to do is think green and renewable… We can mitigate global warming and make a difference in this world.

Sharon asks…

What do you think of Gore’s energy and climate plan?

Gore has outlined a 5 part energy and climate plan. He’ll likely have some role in the Obama Administration on these subjects, so his opinions carry a lot of weight. To sum up the plan:

1) Large-scale investment in incentives in renewable energy
2) Planning and construction of a unified national smart grid
3) Help America’s automobile industry to convert quickly to plug-in hybrids
4) Embark on a nationwide effort to retrofit buildings with better insulation and energy-efficient windows and lighting
5) The United States should lead the way by putting a price on carbon here at home, and by leading the world’s efforts to replace the Kyoto treaty next year in Copenhagen with a more effective treaty that caps global carbon dioxide emissions and encourages nations to invest together in efficient ways to reduce global warming pollution quickly, including by sharply reducing deforestation.

Quite similar to Obama’s energy and climate plan actually. What do you think of it?

Note – I don’t need to hear a bunch of stupid Gore insults. Just stick to discussing the plan.

Windmill Farms answers:

I tend to be skeptical about Al Gore but I think this is a good plan. We do need to fund the basic research that private industry just won’t do, they tend to look no further than the next quarterly report to the stockholders so it’s necessary for government to take a longer view. NASA’s planned moon rover is a good example, achieving 1000 km on a single charge and it’s due to NASA’s funding for research that we have microwaves and many other conveniences. I expect the same result from the new moon project.

1 – I’d add a provision to limit the roadblocks that the Green movement can put up to slow or stop projects that provide renewable power or distribute it. Off-shore wind farms are also very feasible and tapping some of the energy beneath Yellowstone would provide enormous amounts of energy. Funding basic research thru grants and such is the best way to get the technology we need, then use tax incentives to make it easier to adopt

2 – Our grid is so dated and obsolete much of it should just be retired, it’s like using telegraph while your neighbor has broadband.

3 – hybrids are a great idea and we could power them using ethanol-fueled engines to further reduce the need for oil. There’s nothing wrong with ethanol if it’s produced wisely, not with corn but from switchgrass or specialized algae. The NASA project will probably give us much better storage options than we have now so the day of an all-electric car may arrive sooner.

4 – I’d need evidence that this isn’t already done, if it saves money then individuals and businesses have probably already done this, along with checking their thermostats and tire pressure. But if new technology becomes available then incentives for adopting that technology would be smart.

5 – The only carbon limit I’d accept is a direct tax on emission, not any sort of cap and trade. If your fuel bill goes up because your utility relies too heavily on coal and not enough on renewables and nuclear then you’ll encourage them to make the switch. Cap and trade is already full of fraud and theft so let’s not adopt that here.

Overall I’ll admit I’m surprised this has Al Gore’s name on it and as long as we don’t allow the cap and trade shell game to spread further, this is a plan I’d encourage my legislators to support.

Daniel asks…

in english i have to create a superhero and and villian but i don’t know how to design them?

can someone please give me some ideas on how to design the costume for my hero and villian the hero is snake girl and the villian is blizzard king please give me some ideas and i will give u 10 points for the best idea this is not a bribe!!

Windmill Farms answers:

Snake Girl – A young attractive female with auburn hair and hazelnut eyes. Her stature puts her at 5′ 5″ but fierce nonetheless. Her costume resembles the general shape of Wonder Woman in that it is a one piece outfit and hugs her curves while pronouncing them slightly. The costume is made with bullet proof scales resembling the thick skin of snakes while also protecting her from attacks – but at the same time the outfit is flexible to adjust to her acrobatic movements. She wears high shoes that reach up a large part of her calf and are a dark olive green color, similar to the slightly lighter olive green of her torso outfit. She wears a head band on her forehead that curves into a cusp shape pointing into her nose but never touching. She also bears two cuffs, one on each wrist, to protect from oncoming attacks.

Blizzard King – A taller villain who stands 6′ 7″. He wears a vest made of a thick brown animal hide and brown fur that leave his large biceps and triceps for all to admire and fear. In his right arm he possesses a heavy hammer (similar to Thor) that appears to be made of a gray rock that was shaped into a rectangle and placed on a sturdy wood handle that is laced with a chrome colored metal. He has crystal blue eyes and long blond hair that is slightly greasy so that it keeps it’s rugged form even in intense winds. His legs are covered by a brown loin clothed, ripped in such a manner that they fall just short of the knees. He too has boots, but brown and not as high, they extend only just higher then his ankles.

That’s the general outline of their outfit. For powers, I think that’s self explanatory given their names. For reference to the superhero characters (that I mentioned), see the following links, but they are only loosely based off them.

(Wonder Woman:

(Thor -

William asks…

Calling all Creative people!!Need help writing a Story…………?

I need help writing a 2-3 page superhero story!!
here’s what I need :

3 or 4 names : 2 for the main hero, 1 for the villian(bad guy) , 2 for their companions, preferably a wolf , bat, snake ect…..

The main good hero will be a woman ,and the bad guy will be a man

So I also need a summary of the beginning, middle, end, just outlines of what should happen
and a main conflict (example : he kills her mom, so she must seek revenge by finding his one true weakness……SALMON!)

ok, also need some of the characters, both good guy and bad guy’s weaknesses and their superpowers

and what they will look like (ex: crazy red hair, muscular…..)

I need an idea of what their super powers will be, a setting, and anything else a story has in it.

thank you , and I’m telling you I am a horrible writer.If you can help with any of these you will be greatly appreciated!

ok take care –


Windmill Farms answers:

If all what you ask is given, what is your creation in this exercise?

Heroine: Eva, Amora, Diana, Bella
Her companion: A slim, small golden snake. Name Asp. It normally remains wound around her right wrist as an armlet.

Villain: Fero, a blue skinned cruelly handsome dwarf.
His companion: A cunning fox. Name Vix.

The heroine is a normal schoolgirl Annie. She wears a snake shaped gold armlet with emerald eyes. When these glow a deep green Annie has to transform.

As the heroine she can launch Asp as a seek-and-destroy missile.
You can add your own repertoire of powers

Donna asks…

I want to write a fantasy novel and I have an idea.?

I haven’t thought of the main plot yet, but I’m going to do an outline. I have an idea, which I couldn’t stop thinking about, and I want to know what the rest of you think. Is my idea creative, original, ec?.

The story takes place in Asia the during the mid 1700s. There is an alternative history.

Central Asia(these days known as the groups of countries that end in “stan”, from Afghanistan all the way to Kazakhstan) is a region that was colonized by Japan around sixty years before the main story begins and after a four way war with the British Empire, Russia, and the Arabs (Japan won). The colony became known as Tsuyokenri, after Watashi Kenri, the one who led Japan through the war and who became the first ruler of the colony.

Anyway, for the next fifty years, the colony’s government has been buying Indians from the British (The British government has colonized India) and making them slaves. Hunters have even infiltrated India to capture more slaves. The largest racial group living there are the oriental people descended from Japan. Indians are second largest. The rest of the minorities make up less than 1% of the population.

After fifty years, the local oriental people born there are sick of the high taxes and abuse from the Japanese government and the Tsuyokenrese government. They no longer consider themselves Japanese. They want an independent nation and try to start a rebellion. The Indians are promised freedom and equality if they can help win an upcoming revolution. The revolution goes on for five years and Japanese are kicked out of the new country, now known as Byodon. For the most part, Indians do receive freedom, but there is still some corruption.

Anyway, the main plot takes place ten years after the revolution and there is a fantasy twist to it. People have admitted to seeing strange things during the four way war and the Byodonese revolution, but the government denies it and hides the proof. It turns out that there is a group/clan known as the Manslayers who have elemental abilities. The abilities depends on the unusual color of their eyes, which they can change at will. Their powers only work when their eyes change. They have regular eye color and can change it to one the manslayer colors, which look unusual.

The green eyed manslayer can manipulate wind. Their first ability is wind blasts from concentrating their Chi and swinging their sword. They can also hover, pass wind beneath their feet and the ground to decrease friction and increase speed. They can create whirlwinds by spinning their swords.

The blue eyed manslayers can stand and run on top of water, breath under water, and see clearly underwater. When there is water around they can swing their swords to do a water blast. They can also heal wounds by touching them with wet hands. Abilities strengthen during full moon.

The Red eyed manslavers are invulnerable to fire(they can feel heat, just not get burned), They can slide their swords on any friction surface to light the sword up with fire and can perform fire blasts. They also have unusual blood. If regular humans drink it, they will possess increased strength and agility and also become invulnerable to fire; they just can’t manipulate it.

The brown eyed manslayers can slice through any rock or earth easily. They can also blend with any earth like environment. And yes earth blasts with their swords.

The purple eyed manslayers can create electric fields around themselves, shoot lighting from their swords, and summon thunder storms. When they summon storms, they can control where lighting can strike.

The yellowed eyed manslavers automatically heal when in direct sunlight. They reflect sunlight from their sword to blind enemies. They sword can glow to light things up even at night. Eventually, the light from their sword can actually cause pain.

The black eyed manslayers can blend in with the darkness, manipulate shadows and use shadows to attack. They can also teleport in dark areas and create smoke screens.

The white eyed manslavers don’t actually have a pattern regarding their abilities. They can use telekinesis on non organic matter, can teleport short distances, and can create copies of themselves. They can also flash their eyes to someone staring into them. If they make eye contact, the flash can blind them, or sometimes paralyze them.

The manslayers fought during both wars and have now been trying to hide; some are trying to live normal lives without having to change their eyes. The government is after them and knows their individual abilities and weaknesses.

the manlayer abilities are bloodline traits; they can’t happen to just anyone. It usually skips generations, but not always. Most manslayers are Oriental from Japan, but due to interracial marriages, some of the manslayers are Indians as well.
Well, what do you think.
Oops, i forgot. The inspiration is from Rurouni Kenshin, Avatar the Last Airbender, and Naruto.

It seems that a lot of people who want to write a fantasy novel usually use ideas from European mythology such as Orcs, Wizards, Trolls, Elves, Dwarvves, and Dragon Riders. They usually have European armor from the middle ages and European swords. The setting is usually like a European Fantasy world such as Middle Earth from Lord of the Rings, and Alagaësia from the Inheritance Cycle.

I want my idea to be influenced by Asian mythology. Also, the swords they use are katanas, wakizashis, ect.
Another thing I forgot; the abilities of the white eyed manslayers also strengthen during a full moon.

Windmill Farms answers:

Hmm, at first I was skeptical and beginning to think this resembled Avatar: The Last Airbender…but, you really know a lot about this stuff! I was actually interested by everything you wrote! And the idea of the “manslayers” as you so call them is fascinating, assuming of how you potray them in your story.
You obviously have a grasp of what you are planning on writing, and I commend you for making an outline first! Outlining before writing is always a good idea, as you tend to carry your ideas farther and expand as such. Your idea is very interesting, definitly something I would read should you add an interesting plot (which shouldn’t be hard considering the depth and detail you have with you idea).
So you have an excellent idea of a fantasy story, once again assuming you are able to add a captivating plot to the jumble of ideas. The only thing left I could say is good luck with your writing!

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Renewable Energy Sources List

Nancy asks…

List three renewable and three nonrenewable energy sources?

List three renewable and three nonrenewable energy sources. For each source of energy, list at least four advantages and four disadvantages of each.

Windmill Farms answers:

Renewable – Wind power – cheap, available, enviromentally friendly & does not run out. Disadvantage – has to be windy/exposed, initial cost of setting up, can be considered unsightly
Tidal – Cheap, enviromentally friendly, available around the world & does not run out. Disadvantage – cost of setting up, small return for initial investment, suitable locations
Solar – available, enviromentally friendly, relatively cheap after installation. Disadvantages – Cost of setting up, sunny location needed, storing power
Non Renewable – Nuclear – reliable, clean, economic. Disadvantage – enviromental hazard, safety, disposal of waste
Fossil fuel Coal & gas – widely available, relatively cheap, established technology. Disadvantage – limited source, carbon emmissions, price can fluctuate

Sandy asks…

list of renewable energy resources plz?


Windmill Farms answers:

Main renewable resources include:

Wood is one of the main renewable resources. Many countries now have policies that clearly state how the supply of wood and timber is to be managed. This is to help protect the remaining areas of forest from the ravages of industry and deforestation. Trees play an important part in the environment and it is important that levels of trees and other plantations are maintained. Other ways that we can help to preserve and manage our use of wood and paper products is to recycle paper whereever possible. This both reduces the call on virgin materials and also reduces the amount of waste that goes into landfills.

Solar Power
Energy that is derived from the sun is a completely renewable resource. Unlike energy that comes from the burning of fossil fuels and is therefore completely nonrenewable, solar energy can be renewed during the hours of sunlight. This is an effective energy source and one that is gaining in popularity. Many countries are increasing the proportion of solar energy that they consume and this will continue to grow.

Wind Energy
Wind energy is another alternative energy source which is completely renewable. Wind powered generators create energy that can be used instead of energy that comes from nonrenewable resources. This helps to preserve the world’s supply of fuels as well as reducing our dependency on oil.

Biomass is the name given to plants that are grown as an energy source. These plants are grown and harvested in a sustainable manner and are renewable. Fuel from biomass is used for many things, including providing the fuel for new generation cars and vehicles.

William asks…

How are renewable and non-renewable energy sources diffrent?List two examples of each of these types of energy?

How are renewable and non-renewable energy sources diffrent?List two examples of each of these types of energy

Windmill Farms answers:

I am glad you are interested in this question because it is important that we should reduce our reliance on non-renewable resources. Future generations will not thank us for wasting such resources.

Coal and oil are examples of non-renewable energy sources. They are fossil fuels obtained from the ground and were created millions of years ago during a phase in the earth’s development that is over. So as we use these resources less is available for the future. Furthermore burning fossil fuels creates pollution.
Solar panels and wind mills are examples of renewable resources because collecting such energy has little or no impact on its availability for the future.

But it may be worth pointing out that the term “renewable” is confusing. What we really mean is “sustainable”.

Best wishes for a more sustainable future.

Richard asks…

What are all the RENEWABLE and NON-RENEWABLE energy sources?

i have to do a poster for science and i need a bit of help please i just need a list thanks in advance

Windmill Farms answers:

1.Geothermal energy
2. Solar energy
4.Hydro power
5.Ocean energy

2.Natural gas
4. Uranium

Charles asks…

List of reliable energy sources?

Please make a list of all of the reliable energy sources, E.g. Wood, Hydroelectric, Natural gas. Thanks

Windmill Farms answers:

Sunlight, Hydro (water) through dams and tides, wind, burning waste products (directly or methane gas), compost (gives off heat), thermal (underground heat source, like hot springs, geysers) Fossil fuels and renewable/managed fuels (oils extracted from plants, flammable by-products etc.), Nuclear/atomic

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Wind Power Generator

Thomas asks…

What is the career called that deals with renewable energy?

What is the career called that deals with renewable energy, and teaches students how to design things like, solar panels and wind powered generators. What universities of colleges offer the course? Also can someone provide a link to the college or university page that deals with their renewable energy course.
Does anyone know about the course in Uvic? They have someone guy in their commercial holding a wind powered generator model.

Windmill Farms answers:

Many many careers can deal with renewable energy..

Try civil, mechanical, electrical or chemical engineering.

Jenny asks…

What kind of a generator is used on a Piper Cub?

I’m referring to the small wind powered generators that some owners have installed under their aircraft.

……………. and is it not possible to install an engine driven altenator / generator on these aircraft?

Windmill Farms answers:

Its called a RAT
Ron Cox in Georgia makes the TurboAlternator. His company is called Basic Aircraft products

George asks…

What kind of a generator is used on a Piper Cub?

I’m referring to the small wind powered generators that some owners have installed under their aircraft.

……………. and is it not possible to install an engine driven altenator / generator on these aircraft?

Windmill Farms answers:

Some people build their own. There are also aftermarket ones like in the second link below.

Maria asks…

how can i do my part to go green without breaking the bank?

i use compact florecent bulbs
i conserve water
but i cant afford like a wind power generator or solar panels so what else can i do within my reach?
What im trying to ask is how can i conserve power, water, and landfill space for cheap?

Windmill Farms answers:

Wow. Honestly, if you are breaking the bank to be green, you are doing it wrong, my friend. Wrong.

Think of it this way: Probably the greenest people of the past century were those during the Great Depression. These people were extremely efficient with items because they had to be.

Being green saves money!

Though solar panels and whatnot often do save money in the long run (though it also depends on where you live) there are other ways. Me, for instance. I’m a newly-wed, tiny little apartment. We don’t NEED a lot of energy. Just allocating your power saves plenty of money and is effective.

–Check your insulation. This is so much better than worrying about heating/air conditioning. If your house is secure, it will lower the need for lots of heating and air conditioning. Money saved!

–Consider walking/biking to places within reasonable distance. You save on gas.

–Don’t feel you have to have the latest and best. Sure, the new washer or whatever might be all Energy Star and might even save you money in the long run, but if your current works great, why toss out something still useful? Use what you have! Money saved!

–Only wash your clothes when they are actually (gasp) dirty! It’s better on your clothes and saves energy.

–Line dry. Gentler on clothes, saves money, and sunlight is a natural stain bleach.

–Make your own cleaning products. Vinegar, baking soda, borax, and lemon juice make a total kick, can clean anything, and are ridiculously cheap.

–Turn out the lights and unplug anything that is digital/has any sort of light when not in use. It does save money and energy.

–Save your soap! Bits of soap mixed with water make liquid soap!

–Watch your garbage by not buying so much crap. But what you need and aim for minimal packaging.

–Don’t use plug-in air fresheners.

–Compost. It’s fun, it’s easy, it saves on planting stuff, and it saves the energy of your garbage disposal.

–Plants love grey water (used water).

Carol asks…

can I use the generator head from a gas powered generator to make a wind generator?

I have a generator and want to take the generator off the motor and hook up to wind power. Can it work?

Windmill Farms answers:

Maybe. See below.

One problem may lie with rotational speed. The gas engine ran at thousands of RPM. The wind turbine will be running much slower, so you need to use gears or pulleys to change the speed to match that of the generator. Now the question is do you have enough power from the wind turbine to drive the gears and the generator?

Depends on the size of the turbine and the size of the generator.

One additional point, the generator, I suspect, is a 60hz 120 volts AC generator. Running it slower than designed for will produce lower voltages and lower frequency output, which will not be able to be used for anything except light bulbs. Even if you get to output the correct voltage and frequency, as soon as the wind changes slightly, the voltage and frequency will change again.

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Vertical Wind Power Solutions

Robert asks…

What do you think of this story? What would your response to it be?

This story was made in1977.

The Nightmare Life Without Fuel

Americans are so used to limitless energy supplies that they can hardly imagine what life might be like when the fuel really starts to run out. So TIME asked Science Writer Isaac Asimov for his vision of an energy-poor society that might exist at the end of the 20th century. The following portrait, Asimov noted, “need not prove to be accurate. It is a picture of the worst, of waste continuing, of oil running out, of nothing in its place, of world population continuing to rise. But then, that could happen, couldn’t it?”

So it’s 1997, and it’s raining, and you’ll have to walk to work again. The subways are crowded, and any given train breaks down one morning out of five. The buses are gone, and on a day like today the bicycles slosh and slide. Besides, you have only a mile and a half to go, and you have boots, raincoat and rain hat. And it’s not a very cold rain, so why not?

Lucky you have a job in demolition too. It’s steady work.

Slow and dirty, but steady. The fading structures of a decaying city are the great mineral mines and hardware shops of the nation. Break them down and re-use the parts. Coal is too difficult to dig up and transport to give us energy in the amounts we need, nuclear fission is judged to be too dangerous, the technical breakthrough toward nuclear fusion that we hoped for never took place, and solar batteries are too expensive to maintain on the earth’s surface in sufficient quantity.

Anyone older than ten can remember automobiles. They dwindled. At first the price of gasoline climbed—way up. Finally only the well-to-do drove, and that was too clear an indication that they were filthy rich, so any automobile that dared show itself on a city street was overturned and burned. Rationing was introduced to “equalize sacrifice,” but every three months the ration was reduced. The cars just vanished and became part of the metal resource.

There are many advantages, if you want to look for them. Our 1997 newspapers continually point them out. The air is cleaner and there seem to be fewer colds. Against most predictions, the crime rate has dropped. With the police car too expensive (and too easy a target), policemen are back on their beats. More important, the streets are full. Legs are king in the cities of 1997, and people walk everywhere far into the night. Even the parks are full, and there is mutual protection in crowds.

If the weather isn’t too cold, people sit out front. If it is hot, the open air is the only air conditioning they get. And at least the street lights still burn. Indoors, electricity is scarce, and few people can afford to keep lights burning after supper.

As for the winter—well, it is inconvenient to be cold, with most of what furnace fuel is allowed hoarded for the dawn; but sweaters are popular indoor wear and showers are not an everyday luxury. Lukewarm sponge baths will do, and if the air is not always very fragrant in the human vicinity, the automobile fumes are gone.

There is some consolation in the city that it is worse in the suburbs. The suburbs were born with the auto, lived with the auto, and are dying with the auto. One way out for the suburbanites is to form associations that assign turns to the procurement and distribution of food. Pushcarts creak from house to house along the posh suburban roads, and every bad snowstorm is a disaster. It isn’t easy to hoard enough food to last till the roads are open. There is not much in the way of refrigeration except for the snowbanks, and then the dogs must be fought off.

What energy is left cannot be directed into personal comfort. The nation must survive until new energy sources are found, so it is the railroads and subways that are receiving major attention. The railroads must move the coal that is the immediate hope, and the subways can best move the people.

And then, of course, energy must be conserved for agriculture. The great car factories make trucks and farm machinery almost exclusively. We can huddle together when there is a lack of warmth, fan ourselves should there be no cooling breezes, sleep or make love at such times as there is a lack of light—but nothing will for long ameliorate a lack of food. The American population isn’t going up much any more, but the food supply must be kept high even though the prices and difficulty of distribution force each American to eat less. Food is needed for export so that we can pay for some trickle of oil and for other resources.

The rest of the world, of course, is not as lucky as we are.

Some cynics say that it is the knowledge of this that helps keep America from despair. They’re starving out there, because earth’s population has continued to go up. The population on earth is 5.5 billion, and outside the United States and Europe, not more than one in five has enough to eat at any given time.

All the statistics point to a rapidly declining rate of population increase, but that is coming about chiefly through a high infant mortality; the first and most helpless victims of starvation are babies, after their mothers have gone dry. A strong current of American opinion, as reflected in the newspapers (some of which still produce their daily eight pages of bad news), holds that it is just as well. It serves to reduce the population, doesn’t it?

Others point out that it’s more than just starvation. There are those who manage to survive on barely enough to keep the body working, and that proves to be not enough for the brain. It is estimated that there are now nearly 2 billion people in the world who are alive but who are permanently braindamaged by undernutrition, and the number is growing year by year. It has already occurred to some that it would be “realistic” to wipe them out quietly and rid the earth of an encumbering menace. The American newspapers of 1997 do not report that this is actually being done anywhere, but some travelers bring back horror tales.

At least the armies are gone—no one can afford to keep those expensive, energy-gobbling monstrosities. Some soldiers in uniform and with rifles are present in almost every still functioning nation, but only the United States and the Soviet Union can maintain a few tanks, planes and ships—which they dare not move for fear of biting into limited fuel reserves.

Energy continues to decline, and machines must be replaced by human muscle and beasts of burden. People are working longer hours and there is less leisure; but then, with electric lighting restricted, television for only three hours a night, movies three evenings a week, new books few and printed in small editions, what is there to do with leisure? Work, sleep and eating are the great trinity of 1997, and only the first two are guaranteed.

Where will it end? It must end in a return to the days before 1800, to the days before the fossil fuels powered a vast machine industry and technology. It must end in subsistence farming and in a world population reduced by starvation, disease and violence to less than a billion.

And what can we do to prevent all this now?

Now? Almost nothing.

If we had started 20 years ago, that might have been another matter. If we had only started 50 years ago, it would have been easy.

Windmill Farms answers:

I think it is a very mild projection i would have thought i might be much worse .

The aspects of a global nuclear war or the full effects of Global warming have not been included.

Such as rising seas ,which could displace millions of people ,moving them further in land ,to fight it out with the residents already there causing wide spread public violence.

Also global food and potable water shortage ,and we have since come up with many alternatives to producing power ,why did he leave out solar or wind power.

But then this story was from 1977,and even so Asimov is a master at imagining future happenings
I wonder what he would see today ,it will be a different story.
The solution to a world devoid of energy is to think backwards and improve upon it .This is what Permaculture is all about sustainable ideas from the past (only in the past can prove of sustainability be found )

So my response is teach the people about PERMACULTURE a way of life using ingenuity and innovation with limited technology or dependence on Government energy sources,derived from a collection of sustainable ideas from around the world coupled to present level of knowledge
ideally suited for those who want to get back to the country and build a auto sufficient situation for themselves and the family or a community .

People plant rather for the quality of life and to feed their families, than for the market ,so the motivation and the manner are totally different from ordinary agriculture .

Although the basic concept of Permaculture also applies to Organic and sustainable farming,

Utilizing soil management ,and mulching

The utilization of space is more concentrated ,thinking in cubic and vertical terms instead or merely horizontal on the plain ,

Having many principle to follow such as utilizing all resources and following and enhancing energy flows ,
for example the ditch around the house catches the rain water and leads it through the chicken house where it cleans and picks up the manure to deposit it in the vegetable patch

Permaculture means permanent agriculture
a concept put forward by Bill Mollison in the 60`s

Which offers practical solutions for energy systems ,infrastructure ,intelligent design in housing,
animal shelter ,water systems and sustainable agricultural practices.
With the world and it`s history as it`s source
From the chinampas of Mexico to the terraced gardens of the Andes.
From the dessert wadis to the steppes of Russia.
Covering all climatic conditions temporal, dessert, humid and dry tropics.
With chapters on soil ,Water harvesting and land design,Bio diversity
Earth working ,Spirals in nature,Trees and water ,utilizing energy flows,
Strategy for an alternative nation

including gardening tips,bio-gas,companion planting and ideas for structures ,how to cool down houses in hot climates ,how to warm up houses in cold climates with out using technology but rather by design.
The Permaculture designers manual by Bill Mollison,which cost about 40 dollars.
And is the best all round book you can get,on Environmental design,.(tagiari publishing,

Some other writers that are on the Internet are
David Homegrown
Larry Santoyo
Kirk Hanson

Masanobu Fukuaka has written ,
One-Straw Revolution
The Road Back to Nature
The Natural Way of Farming
Simon Henderson
and Bill Molisson.
There is a Permaculture Institute in Australia
there is also a Dry land strategy Institute in North America

Links to previous relevant answers
bio diversity;_ylt=AoHkf4Mao.pJn3xHi6xV1Pnsy6IX?qid=20070728220706AAmTdlT

organic pest control;_ylt=AhfcBgXmgqLHJDS.1hZOVA3sy6IX?qid=20070609070008AA35IZ5

growing your own;_ylt=AqLpdYrdelPnP0HiyH2wurjsy6IX?qid=20070528180353AAxQuAm

water harvesting;_ylt=AlhND.Nc1wg2D5AyfZU9NzDsy6IX?qid=20070504150425AAAwVwA

the rippling effect;_ylt=AvwaHVtzogdsI8MrfMcvhaHsy6IX?qid=20070706214424AAjgbuz

choosing a site;_ylt=An5GAG03Te7IFEFaD1XTwkfsy6IX?qid=20070711193404AAGQlW7

alternative solutions to Urban sprawl;_ylt=AksobeRFQTAnaaAr4FEBAiMAAAAA;_ylv=3?qid=20071013043017AA6wcWX

Lisa asks…

video capture problem ”usb video grabber silvercrest” HELPPPPPP……………?

i ‘ve bought this pack of silver crest video grabber and cyberlink power director 9 to transfer my home videos of my old hi8 camera to my pc(a sony vaio pcg-3j1m)and then to dvd .With my First attempt everything went fine but with the next cassettes I got this message over and over again THIS MOVIE IS COPY PROTECTED,RECORDING IS PROHIBITED the recording stops every few minutes.I’m going mad I’ve searched on the web but I haven’t found a solution .Can anyone help me out ?I’ll take any suggestions and I;will download any Programme to fix this.Please be detailed. thank you in advance!

Windmill Farms answers:

Copyguard/macrovision is detected by looking at vertical sync pulses. On Hi8 the vertical interval is recorded near the edge of the tape. I suspect that the tape in the cassette you are trying to play has edge damage or even folded over. This is what your capture card thinks is copy protection. Try winding the tape to the end and rewinding a few times, there is a chance this might straighten it out. The only other solution would be to play the tape through a TBC (timebase corrector) or a different player that has TBC built in. Most photolabs use TBC, so you might consider sending the tape out for conversion.

Paul asks…

angle of attack vs lift.?

hey everyone. i was wondering if you have any ideas how i could set up an experiment which would show the relationship between what angle a planes wings are and how much lift each angle would produce? id appreciate any help. thanks

Windmill Farms answers:

Your question requires a drawing to construct but a verbal solution may help. Wind striking the surface of a wing produces lift and drag. At zero a flat wing, no curve on top, produces zero lift and some drag. As you raise the angle from zero the lift and drag rise together until at vertical the lift again reaches zero.

Take a flat stick like a paint stirrer for a gallon size. Glue a plastic compass to the end of the stick such that the 90 deg line is along the edge of the short side with the zero point of the angle measure at the back end of the edge. Place this stick on a straight stiff cardboard edge so that the “wing” sticks out on one side and you can turn the stick from the other end. The card board sheet should extend vertically from just in front of the leading edge of the “wing” with the curved part of the compass touching it. Add a fan to produce a wind running parallel to the cardboard sheet. With the “wing ” a zero ther will be no lift, As you rotate the wing the wind will produce lift

A cardboard box shorter than the stick with open ends for the wind and two holes oposite each other for the wing. Sould make a wind tunnel for the fan. By hanging weights outside the hole on one side and turning from the other in a fixed wind the set up should demonstrate the rise and fall of lift with angle of attack. Power makes planes fly if you have enough you can fly vertically, like a rocket.

To measure the lift, hang a piece of wire from the end of the wing hanging down out of the air stream. Attach small weights to balance the wing to zero lift point to measure lift. This could be a small plastic cup to which you add water (Use your assistant) which would be a mesurable and variable weight.

The lift will increase as angle increases to a point (@45 deg at which it will then decrease with increasing angle back to zero.

In a real world plane like the Piper Cherokee that I first flew, this point was called the stall point and the angle was closer to 30deg. When this happens you get warning buzzers and if continued rotation up zero lift. Producing an exciting vertical nose dive. Best experimented with at a high altitude to provide recovery height.

Charles asks…

How do I cure water logging on my land?

I own a 76 acre land in Rahimyar Khan, Pakistan.Of which 55 acre is waterlogged.Please tell me measures to cure this

Windmill Farms answers:

I grew up on a farm. We had several fields where there were boggy areas that were hard to work because equipment would get stuck in the mud. Also the crops in the water logged area would produce poorly.

The local solution was to tile the land. It requires about a 2% fall, so if there’s no lower points of drainage near your land, this won’t work. Tile was placed by hand in my grandfather’s day, but modern laser guided tiling machines dig the ~2 meter depth and place the hollow fired clay cylindrical tiles end to end. They are about 1/3 meter in length and slightly permeable. Water can enter the tile at the joints as well.

Note that it takes about 2 wet/dry seasons for the overlying soil to develop vertical fractures that form conduits from the surface down to the tile before the tile will flow at full capacity in the wet seasons.

If your land is the local “sump” or low area, another solution would be to use wind power to pump the water out of the low area and into an adjacent drainage system. Think of the Dutch windmill system. If the nearest drainage is too far & pumping is cost prohibitive, then planting vegetation with high transpiration capacity is probably your only option.

Thomas asks…

Physics Question, Ramp Momentum?

Ok my project is to make a car powered by momentum and to end in a distance by its own, sorry but my method of trial and error has been going on too long.

So here are the given:
The car gains momentum on a ramp 1.32 meters with an elevation of 20 degrees.
The car needs to end in a distance of 2 meters.

I need to find:
What weight is needed to end in 2 meters?

I need the solution to know how to do it in the future, thanks!

Windmill Farms answers:

Okay so….. Before i explain you should know that this problem cannot be done because there is insufficient information. But i can show u how to do it.

You’ve described a triangle so draw that out. Next use ur trig functions to find the vertical leg. You want to find the vertical leg because, even with ramps, the speed at which the car will leave the ramp is determined by the vertical ramp. This is because when you raise something above the ground, you give it some potential energy, the reason u give it (gravitational) potential energy is because you’re doing work against gravity. The value of the potential energy you give it is….

m=mass of object
g= acceleration due to gravity= 9.81m/s^2
h=height you lift the object

so after you find the vertical leg which is sin(20)=Op/Hyp, so then it woud be sin(20)=Op/1.32. Solve for “Op”, and Op=0.45146m. This is the height of the ramp and therefore, the amount of potential energy you give this object will be… E(p)=m(9.81)(0.45146). I know thats not “a” value, but in physics, sometimes it is important to remember that you have to just keep going on with your work and not just pause just becaues you run into a variable that you can’t solve with a full value.

Okay so our value for the potential energy of the object @ the top of the ramp is E(p)=m(9.81)(0.45146). But once it comes down the ramp, shouldn’t all of this energy be converted to kinetic energy? In other words the energy that a moving object has, thats what “kinetic energy” is. And the equation for that is
v=velocity of object

so again, since all of the potential energy should be converted to kinetic energy, mathematically they should be equal to each other right? So set the two equations equal to each other like so.


you have m on both sides of the equation, so that means, you divide m on both sides and the ratio will remain the same, so divide both sides by m and get rid of it you should then be left with….


great! Now everything is known except for v. Now just solve for it.


so great, this IS ur velocity.

With momentum, p=mv (p=momentum). So you don’t really need to use “momentum” for this problem because there is no collisions between two masses.

Now, here comes the part u didn’t give me enough info on.

Newton’s….. Um okay one of newton’s three laws says an object in motion stays in motion unless an external force is acting upon it.

So if the car is in motion, and it deccelerate to come to a stop, that means a force needs to act in the oppposite direction to make it velocity v=0.

I’ve solved for the acceleration by using the kinematic formula – -

v(final)^2=v(initial)^2+2as —————-> s=displacement NOT speed. So s=2

final velocity = 0 because, well… It’s coming to a stop..

a=-2.2144 (the negative sign suggests a “de”cceleration)
now, from here…


i know “a”, and im trying to find m or F, doesn’t matter, so that means i need either m or F but you didn’t give it to me. “weight” is defined by w=mg. And that IS force. Since i don’t have anything, i can’t solve for weight.

Keep in mind tho that during all this, which is after the car has left the ramp, it is going in a horizontal direction, so that means the only thing other than wind resistance that should be acting on the car is friction, you need something called a friction coefficient AND the normal force which is basically just the weight of the car, excluding the wheels. You need the friction coefficient between w/e is “rubbing”. Pretty much, if you have anything that is rubbing, that is the friction coefficient you need to find, the two materials that are rubbing on each other. F(frictional)=uN. N=normal, u=coefficient of friction (kinetic friction). So.. Give me the coefficient of the material of the axle and the material of the wheels, and the weight of the car excluding the wheels. Also tell me the material of the floor off the ramp. Because, if it’s carpet, i need to apply extra equations and yea.. Just give me all the details and pm me or post it again or soemthing. THEN i or someone could tell u how much weight you need.

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Micro Wind Power Generation

Ken asks…

What are some examples of the ‘alternative energy’ current use?

What are the some examples of its current use?

Windmill Farms answers:

There’s a big difference between “alternative energy” and “alternative fuels”. Since you’re posting under “Green Living”, I’m going to assume you are talking about residential “alternative energy. Basically there are solar, wind and micro hydro.

Solar is the one getting all the media attention because photovoltaic cell arrays have been coming down in price but there are many ways of utilizing solar energy in a house. A house can be designed for passive solar heating but that limits the design and siting of the house. Solar thermal can be used to heat the hot water which then can be used directly or used to store and heat the home as needed. Solar can also be used to provide air conditioning. There’s the obvious use of photovoltaics to provide the electricity to run a conventional air conditioners but there are also air conditioners that are driven by heat, they are called absorption chillers. Large campuses use absorption chillers to provide thousands of tons of AC and RV’s use absorption chillers to provide refrigeration that run mostly on propane. Such absorption chillers can run on solar heat or use solar heat as a preheat to improve efficiencies. Indeed the very earliest refrigeration and air conditioning systems were all absorption chillers. All forms of solar suffer from siting issues in that not all lots and home designs are suitable for solar and from the fact that the weather can not be controlled so the amount of energy that can be produced can not be based on demand.

Wind power is the other alternative energy source that gets media attention. Like solar, wind power generation is subject to siting and the weather. Unlike solar, wind power is at it’s peak at night which unfortunately is when power demand is at it’s lowest. The inability for wind power to be available on demand limits the percentage of the grid that we can base upon wind power.

Micro hydro is the only alternative source with some degree of on demand availability but it requires that the site has certain water features such as a running creek or river. Hydro power is also subject to complicated water rights issues that are not easy to sort out.

Nancy asks…

What are some everyday uses for oil and what are some alternatives?

Windmill Farms answers:

Here are some common products that are made from oil:

•Diesel fuel
•Heating oil
•Jet fuel
•Bunker fuel
•Synthetic rubber
•Synthetic fibers
•Photographic film
•Food additives (canned food)
•Synthetic fibers (such as polyester, nylon, acrylic)

In oil producing countries with little refinery capacity, oil is sometimes burned to produce electricity. Renewable energy technologies such as solar power, wind power, micro hydro, biomass and biofuels might someday be used to replace some of these generators, but today the primary alternatives remain large scale hydroelectricity, nuclear and coal-fired generation.

Vegetables are used to produce biofuels.

You can do things to reduce your own use of oil by taking public transportation, using a bike to get to places close by, amd stop using a few of the things listed above, like makeup.

Hope this helps!!!

Carol asks…

Convert Amps to Kilowatts for a generator?

I’m trying to solve a power problem and need at least 600 amps of continual power at 14 volts DC but could need over 1000 amps for intermittent ‘boost’. What size generator do i need to maintain at least 600amps continuous at 14vDC? Could 1-2 high power car alternators supply this if mounted to a microturbine engine? Is it better to use AC power generation and convert it to DC in this case?

Windmill Farms answers:

The problem is that generators with this current rating are not easy to find, as there are few reasons for such a thing. At 14V x 600A the power is 8.4KW, but the peak/full load is 14KW. A car alternator is about 50A=700W, maybe a little larger, but for higher powers people move up in voltage for better efficiency. I mention power because that is related to the size and cost, as well as the engine needed. Despite all the stories on the internet about getting more power from car alternators, the current rating does not change. The voltage can be increased moderately (at sufficient RPM) to get a moderate power increase in a higher voltage system.

It all comes back to current rating with generators, while the watts is the power of the engine. The micro gas turbines I know of are a bit small for this. A petrol engine or even a small diesel will do it more reliably and cheaply. Generators can start a motor with more starting power than their rating but it has to be brief and the energy comes from the flywheel, and hopefully doesn’t last long enough to overheat the wires..

If it is really 14V you need at these currents it may be better to go for a mains power supply. While it is still an unusual power supply, it is probably more likely you can get someone to make an appropriate transformer and diodes. It would still likely be something that had to be designed and made especially.

Generally speaking the peak load is the rating. An overload may be tolerated for a few seconds only. The actual behaviour (how long a transformer or power supply or generator can sustain a particular overload) depends on the design, but is not always something a designer wants to talk about or specify, because of the risky nature of “sailing too close to the wind”. A (large) battery could supply the peak current, but even that is not straight forward for 1000A.

Incidentally 1000A is beyond any ordinary wire sizes, for the good reason of skin effect at 50/60Hz. The move to busbars (with a different shape factor) occurs near this current. Even a DC generator will be involved with this. So is a transformer. The design starts to become extreme. Diodes with these current ratings or switches are probably available but large, lossy and expensive. The dissipation across a diode with 1000A and 1V for forward voltage drop would be 1KW. That is heat the diode has to get rid of. The same applies to commutators and brushes.

The ordinary wall power outlet itself is unable to supply 14KW. It will be a special connection, most likely a three phase supply with that power rating.

I have to say I cannot even imagine what you are doing, unless it is electroplating or refining or something like that. You will need a consultant, because of the significant cost and unusual nature of this application. If possible I would reconsider, go to a higher voltage, reducing the current to more reasonable levels for this moderate power. If it must be 14V I would consider splitting it up into several smaller (and more obtainable) units. The larger power supplies for 14V are

I am not surprised that 1000A is misunderstood. The link below is a completely misleading rating. However lower down it says 100A, maybe that is closer to the mark. I tried searches for some of these items, and just got false hits from silly search engines. Larger 14V off the shelf power supplies may be 30-60A, like the car alternator in other words.

Donald asks…

if you wanted to generate your own electricity to power your own home which energy source would be suitable?

Windmill Farms answers:

If it was a financial consideration I would ignore solar and wind power – they just about break even over the life of the kit (10 to 15 years).

I would look towards burning a fuel and using the heat to drive a turbine and generate electricity that way. Controllable and you can get electricity when you need it – just add more fuel and off you go, the waste heat can be used to heat your house, to cook with, and maybe even have spare heat to sell to a neighbour! Spare electricity can be sold to the grid and you get tax rebates for this (in the future look for micro CHP schemes coming in – domestic power stations

Apart from the installation costs, fuel can be cheap – you can use wood chips (cheapest fuel source at the moment) which is renewable fuel and good to use, it is a by-product of wood using industries. You could also use food waste and domestic paper etc waste.

Anyway, domestic electricity generation doesn’t really pay for itself at the moment

Laura asks…

What do you think is going to be the biggest growth industry in 20 years?

If you had a high school graduating class to advise about what’s the field with the best opportunities, what would you say? Seems like we all have a “crystal ball” once we get old enough for a bit of perspective. Give it your best shot.
btexpress24: No, I’m not a teacher. I’m retired. I just used the classroom example to quell those who would complicate the issue with lines like “What the kid does best, or likes best” answers. That’s still number one for an individual kid, but not as relevant when speaking to a room full of kids.

Interestingly, no one as said directly (though several have gotten close) what I was thinking of. But these answers are all good but one: no need to learn a foreign language, because in 20 years oil will be either gone entirely or prohibitively expensive to extract from the earth.
This one has gotten such interesting answers I’m going to extend the deadline and then let it go to a vote.
Great stuff, but nobody hit what I was thinking, which is to design things made out of recycled materials, thereby increasing the incentive to recycle. So let’s see how this votes.

Windmill Farms answers:

Micro power generation (small home and office multiple power generating units which will be connected together to implement the grid and reduce demand of traditional energy sources) will be big business

With the fact the we have already passed peak oil production and with present and future energy demands!
In about 20 years if not sooner the market will be begging for alternatives.

Further ADDED
A good idea would be to set up a company which would offer the service of measuring potential energy savers and energy makers for both private and public sectors.
This could also in involve the fitting and maintenance of devices, a course in cybernetics (feedback systems) would help in development and improvement of ideas.
Getting in early on, one could make a good profit before the market becomes flooded!

NewScientist 21 Jan 2006
A revolution in small-scale roof-top generators could turn the electricity industry on its head and soon even outstrip that of the world’s nuclear power industry. The attraction of these personal microgenerators is that they are very suited to renewable sources – in the form of wind turbines, photovoltaic panels or water wheels – helping to slash carbon emissions while taking the strain off overloaded distribution grids. FEATURE Pages 36-39

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Wind Energy

Carol asks…

how good is wind energy?

How do you know wind energy is reliable to us? has it worked before? would you recommend it and why?

Windmill Farms answers:

Wind energy is reliable-as long as you have wind.
This is why wind turbines are mostly built in areas like Texas and the midwest of the United States.
The energy balance (the amount of energy it takes to replace the energy it took to build the windmill) of the average wind turbine is six to eight months.
The average modern wind turbine-if strategically placed-produces electricity 70%-85% of the time.
One 1.8MW turbine at a reasonable site would produce 4.7 million units of electricity per year, powering the needs of 1000 average households, or run a computer for 1,620 years.

Unfortunately, I could not find the average wind turbines efficiency rating in terms of taking the wind’s movement and producing electricity, but I assume that this data proves that wind power is reliable if the location is good and would definitely recommend it if you live in a windy area. In a city where the buildings block most of the oncoming wind, it is not advise able.

Some of the windiest cities in the United States, spots where wind turbines are probably already in use, are:

1. Blue Hill Observatory, Massachusetts
2. Dodge City, Kansas
3. Amarillo, Texas
4. Rochester, Minnesota
5. Casper, Wyoming
6. Cheyenne Wyoming
7. Great Falls, Montana
8. Goodland, Kansas
9. Boston Massachusetts
10. Lubbock, Texas

If you live near one of these cities, a windmill may be a very reliable choice for producing energy.

I hope this helped.

David asks…

Pro/against wind energy?

What kinds of people would be
1. For
2. Against
wind energy/turbines??

thanks for your help :)

Windmill Farms answers:

I think more people would accept wind energy if the energy produced helped people near to wherever the wind turbines were placed. If they saw a direct benefit, nearly everyone nearby would say yes, lets have them. As it is, the people nearby get to endure the noise created by these turbines, damage to the environment (roads are built and massive damage is done in erecting turbines) and even aesthetically, they are often seen as an eyesore. But if the people nearby received electricity directly from these turbines for free or even at a low cost, they would say yes, they are okay. The main problems are twofold: Firstly, that the energy produced is to benefit people who do not live in the areas of the turbines, and secondly that, they do not stop the production of energy by any other means (IE, nuclear). There is a severe lack of thinking in the making of wind turbines, in that they do not account for when the wind is not blowing. This means, whenever the wind does not blow, energy must be produced in ways other than wind. Likewise, when the wind blows too much, much of the energy produced, is dumped as waste. In the UK, about one quarter of wind turbines are not operating at any one time. However, if wind turbines were combined with solar, built into the turbine towers, they would produce energy at times when the wind was weak. Then there is the dumping of energy. If that excess energy was used to pump water uphill, it could be used as hydro energy later, using an upland lake as a form of battery. Apart from these things I have mentioned, there is the view that these wind turbines do not blend in to the environment. They all look the same. Couldn’t they be made to look differently and pleasing to the eye? Do they really need so much concrete to act as a base? There is also the problem that local councils do not listen to the people in areas that they want to erect turbines. These people, who have lived in an area all their lives, have their countryside devastated. I just moved out of a log cabin in Wales not long ago, because the tallest turbines in the UK are about to be erected there. Spread about the whole hillside, they would, when built, give a flicker effect over the land that I lived on for half the day. Sunshine, broken by the movement of the blades. Imagine someone with epilepsy… That power which is planned to be produced, was to be directed to Liverpool, England, not Wales. Turbines put in Wales, do not even benefit the people in Wales. To try to convince people in an area that they are a good thing, the companies which make the turbines, tell them that it will create jobs in the area, through maintenance and such. This never happens. The jobs go to outside companies, and outside people. Then there is the land owner, of where the turbines are to be built. They often receive more money per year, per turbine, than these very same turbines can produce at full capacity over the term of a year.

Again, in North Wales, UK, a forest called Clocaenog Forest, has been given the primary go ahead of wind turbine construction. This forest, is one of only a very small handful of areas in which the native red squirrel still lives, yet if the construction of the turbines goes ahead as planned, the entire forest is set to be cut down. The cutting down of the forest is already in progress, even though the final agreement of the turbines has not been formalized. This does mean, that another rare species is closer to being lost. It also means, that an entire forest is lost. The reason they need to be chopped down, is because the lack of trees will mean that the wind will hit the turbines easier, with less turbulence which might be cause by the movement of the trees branches. It is a managed forest, used for paper and wood pulp, so jobs are set to be lost too. But I would like to know, how the heck can the total annihilation of a forest be good for the environment?

That is just the large scale turbines. In the UK, it is easier to install a six foot wide satellite dish than it is to install a two foot wide wind turbine. A friend of mine recently was taken to court, and told to dismantle a small wind turbine, even though he had been using it to power the lights in his house for over 12 years.

I am not against wind turbines. They could be useful. But at the moment, a heck of a lot of taxpayers money is wasted in building a system which is not efficient. People in the areas of wind turbines are lied to by business, councils and government.
By the way, the people against turbines are often refered to as “NIMBY’s”, Not In My Back Yard.

Hope this insight is useful to you…

Sandra asks…

how is wind energy used,what is the future of wind energy?

Windmill Farms answers:

Wind energy is used by allowing the wind to turn the blades of the device known as turbine. It is the opposite of a table fan. We use electricity to turn the fan blades. In turn the turning fan blades suck in air from behind and send it to wards us at a higher velocity so we can feel the breeze on us. In the case of wind turbine the wind which is flowing at a velocity turns the blades of the turbine. The turbine can be connected to a electricity generator or a pump. If connected to a generator it produces power and if connected to a pump it can be used to pump water from a well to the surface.
Wind powered electricity is getting very popular in those areas where we get good wind with a reasonable velocity. Pump are put in areas where wind is good but intermittent.
Future of wind energy is good. As the turbine is being modified to give more efficiency the cost of it is also coming down. This is making wind turbine more economical.

Mary asks…

What are some examples of wind energy?

Also what are the pros and cons of wind energy?

Windmill Farms answers:

Wind farms are the best example of wind energy. These are farms where 20 or more turbines are erected to catch the wind, turn an electric motor, and create electricity. (See the 1st link below.)

The greatest PRO is that the cost of wind produced energy is LOWER than electrical energy produced by diesel or oil. It is comparable with the cost of electricity produced by natural gas; but more expensive than electricity produced from nuclear fuel. Other “pro” wind issues are that it is non-polluting, takes up very little ground space, and is quiet.

The greatest “CON” is that wind blows intermittently–that is it isn’t always available, and we want electricity to be always available. The other issue is that the wind blows best off shore, and in the Great Plains of the US, but the energy is used where the people live. This means that building the needed transmission lines from where the wind blows to where it is needed is costly. To resolve that problem, wind farms are now only built where there is excess capacity on the existing electric grid, but soon there won’t be enough places to build new wind farms. The only other “con” is that you can see wind turbines; where most other means of producing electricity is contained in a small area.

Joseph asks…

where is wind energy found and how is it removed?

Windmill Farms answers:

Wind energy is found everywhere, just that is isnt found in constant amounts so “removing” it isnt feasable.

First, geographers work to find areas that have a fairly constant wind flow, from a fairly constant direction year round. These are usually places that form wind tunnels from nearby mountains or large plains. Once a nice windy spot has been found a “wind farm” of many large turbines (look like giant propelllers) is set up. Wind turns the turbines which in turn gernerates energy that can be used to power you house.

*Note – not all windy places make good wind farms. Areas that are environmentally sensitive such as bird migration routes generally are not used as wind farm sites for fear it may affect the birds.

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Is Wind Power Green

Mandy asks…

Is wind power a good way to get “green” energy or a colossal waste of money?

I’m actually all for “green” energy like hydroelectric, geothermal and nuclear energy. Wind power just seems to be a giant waste of money though.

Windmill Farms answers:

There are 4 problems with wind power that make it less than optimal compared to hydroelectric and nuclear.

1. The wind turbines are a hazard to avian wildlife.
2. The turbines create a significant amount of noise, so they need to be away from people who live in the area. This creates a second problem where isolated areas have little infrastructure like transmission lines to transport the electricity.
3. The wind strength is variable and an unreliable source for constant electrical needs.
4. The turbines are expensive, and require considerable resources to maintain.

5. The turbines generate very little electricity for the amount of money put into it. While it might be “green”, much of the public fail to realize that it costs more money per watt of wind energy than any other. While some people might choose to pay a little extra to convert to a green source of energy, nobody in their right mind would pay 400-500% more on their electrical bill just to be green. People will drive 3 blocks away to save 1 cent on their gas.

Each of these 5 factors carry with it a price tag, in terms of land value, depreciation, wildlife value, etc…

It’s also interesting to consider that the sum of all “Green” energy that has ever been generated since the dawn of mankind (solar, wind…etc), does not even amount to a single day’s electricity needs of the planet.(1)

Robert asks…

Is Wind Power (or other Renewable Sources) actually needed?

Pros and Cons.

Windmill Farms answers:

Wind power is competitive economically with electricity generated by fossil fuels.

Electricity generated by wind power has a cost of production of 4 cents per kilowatt hour.

Fossil fuels, in particular coal are very destructive to the environment. Fossil fuels not only release green house gases to the atmosphere, but also in the case of coal which is generally contaminated with radioctive Uranium and Thorium causes radioactive contamination as well..

Essentially coal burning also causes radioctive contamination of the area around the power plant where it is burned, but also the ash left over is essentially radioactive waste.

Wind power is vastly superior to power generated by fossil fuels.

Wind power is economically competitive with fossil fuels and does not cause the pollution and greenhouse gases that burning fossil fuels causes.

Joseph asks…

how do i get to island of wind on zelda phantom of the hourglass?

Windmill Farms answers:

Do you mean the temple of wind?

From the Windy City:

Isle of Gust

As you may have already guessed, the Isle of Gust is… Well… Gusty.
Frequent strong winds make it difficult to maneuver at times, though it can
also be helpful as well. After you dock, make your way north and up the
stairs. Defeat the Miniblins, and the last one will yield a Red Rupee. Go
down the stairs to the east, kill the Chu-Chus, and up another flight of
stairs. When the wind is not blowing, jump across the gaps until you reach
a large plateau full of Miniblins. Kill them all, and again the final kill
will earn you another Red Rupee. Keep heading east across the water, making
all of the Chu-Chus pay for being different than you, and once you reach the
far east, head down to another group of Miniblins. Defeat them all for yet
another Red Rupee. Grab a bomb plant to destroy the wall to the north, then
head through the opening.

Inside you will find a chest containing a Courage Gem (like the Power Gem,
except green and courageousy) and another journal. Might as well read this one
too, since you’ve already pried into so many other people’s lives. Also on
the wall is another map of the Northwestern Sea, with an arrow pointing toward
the island in the northeast, and two X marks, which indicate uncharted islands.
You should mark the X’s; the arrow isn’t as important. After you’re done in
here, head back out.

Go back east in the direction you came, back up the stairs onto the mesa.
Stand at the edge, just south of the stairs, and wait for the wind to blow,
then leap across the gap. With the wind at your back, you will be able to make
it across. Do the same for the next jump, then kill all the Miniblins for
another Red Rupee. There are also 3 holes in the ground indicated by slightly
misshapen dirt where you can dig for another Red Rupee each. Once you have
all of them, head inside the cave – taking the stairs will lead you back to the
beginning with no shortcut back.

Inside the cave, jump into the pit with about 15 or so Miniblins. I believe
there are three specific ones that drop Red Rupees – the first, third, and last
ones I killed gave me a Red Rupee. After you’ve killed all of them, a chest
will appear. Grab it, along with the chest that was already there for a
treasure map and a Wisdom Gem (wisdomy) respectively, then head outside.

Outside, kill more Chu-Chus, then use the rising gusts of wind to carry you up
to the top of the plateau. Use the wind to jump to the left, then kill the
Miniblins that await. Go down three flights of stairs, then head north. The
entrance to the Temple of Wind awaits, but it is blocked by fierce gusts of
wind, so you cannot enter yet. There is a map there with an X… Mark it, then
head back down. Go south until you get to a rising wind, take it up and head
north. Go around and kill the Chu-Chus, then south again. Jump down and kill
more Miniblins, then use the Shovel to uncover a rising wind that will lead you
to a chest with a Power Gem. After grabbing that, head to the north, then use
the Shovel again for another wind to lead you up again. Go north, and instead
of using the wind that is already there (unless you feel like slaughtering
another Chu-Chu), uncover the gust to the left to lead you upward. Head up and
then down, until you come upon another gust. This time, you should use the
Shovel to cover it up, then take the path that it was blocking. Continue up,
and then dig up another weird earth patch near the stairs for a Big Green
Rupee. Next, head up the closest wind gust to where the X from the previous
map is, and check out another map, this one with three X’s that show the
locations of three windmills. Mark them, then head down.

Your next step is to get to each of the three windmills marked on the map.
Jump back down the cliff, then bury the gusts until you can get through to the
rocks. Clear them, then head east into the sands. The next part is a little
tricky – you have to walk very slowly through the sand so that you don’t
disturb the monsters that dwell beneath it, who will come and swallow you up.
If you are detected by one, make a mad dash for the nearest high ground for
safety. If one of them swallows you, rub your stylus very quickly to free
yourself. You can also defeat them by throwing bombs into the sand for them
to swallow. Head all the way to the southeasternmost windmill, then blow into
the mic to activate it. Next, head west, killing the monsters you can,
avoiding those you can’t, until you get to the two western windmills. Activate
them, and two doors will open, leading you to the entrance of the temple, which
is now cleared of the horrible wind gusts. At last, head inside the temple.

Now you are at the Temple of Wind!

Donna asks…

Wind power question – Green Energy?

Is anyone using a reasonably priced wind powered power source for your home? If so how much did it cost and where can I get one?
Does anyone know of any DIY projects that are worth while?

Windmill Farms answers:

If u’r thinking about building it yourself, you can buy this manual that teaches you how to make a wind power system.

It contains a complete step-by step instructions to make a professional grade 1000-watt windmill, with detailed diagrams and instructions, using easy-to-find material.

Betty asks…

what are green projects?


Windmill Farms answers:

The US is currently involved in investing finances in green projects. They include development of wind powered turbines and solar power to produce energy. Rather than coal and gas powered plants to produce energy.

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Advantages Of Wind Power Articles

Mark asks…


What are the disadvantages of the alpha ventus wind farm??? I need yourrr help like nowww… Searched everywhere cudnt find anything -.- , Please help ! :) x Love you if you doooooo!!!!!!!x

Windmill Farms answers:

Have a look at the web page about wind energy in Germany at:

The page includes a list of disadvantages of wind farms, namely:

* Expensive initially to construct, especially off-shore turbines due to the added complications of the higher-spec required to withstand more severe elements, added costs of building off-shore, and then maintaining them
* No wind, no power
* Some people think that wind turbines spoil the look of an area – the sites are often in remote and attractive areas
* Wind farms create a low-level noise
* Wind farms can interfere with television reception and radar
* The MOD have concerns that off-shore wind farms will interfere with their coastal radar equipment
* There are environmental concerns over the interference of wind turbines with bird migrations and marine life/sea-bed disturbances in the case of off-shore farms

Make sure you read the information on the Alpha Ventus website at

However, as you would expect, this website concentrates on the advantages.

Read too this article from the English version of Germany’s “Der Spiegel” magazine focusing on the expense of wind farming:

More disadvantages of wind power here:

Donna asks…

Solar Thermal Tower Plants or Solar Stirling Dish Farms?

To power 40,000 houses or more, which is better? Which one is more efficient and costs less to build and maintain? Which one also needs a smaller land area to build?

Windmill Farms answers:

A “solar thermal tower” could mean a power tower that uses heliostats or a solar chimney that creates wind currents to power a wind generator in the chimney. Either takes a large land area. This article says the the solar parabolic dish with a stirling engine generator has been made to be the most efficient: This also has an advantage of being scalable.

Joseph asks…

How can Petroleum (Crude oil) be good?

I was just wondering if petroleum could be good in a way, an advantage. I know it can be very polluting, but how is it used? Does it power anything?

Windmill Farms answers:

Oil is a product of nature and is only “polluting” in the context of our definition of pollution. Oil has been seeping and catastrophically spilling onto the surface of the planet for at least the past 400 million years, since there has been significant enough amounts of life on the planet in the form of phytoplankton and other life to supply the oil forming processes in our planet. Some scientists even believe that there are significant sources of abiotic oil on the planet, which would suggest that oil “pollution” has been around for about 4.5 billion years now.

In the natural environment oil is a food source for many bacteria. Entire biological communities feed on natural oil seeps in the ocean and on land which in turn supply food for larger organisms. The US Bureau of Ocean Energy Management, Regulation and Enforcement says this about these biological communities. “Perhaps the most exciting biological discovery in this field occurred in 1984 in the Gulf of Mexico when unique
communities of previously undescribed large mussels, snails, and tubeworms were discovered near gas vents. Since
that time, many other rich seep-associated assemblages have been found in the Gulf of Mexico. Surveys suggest that
widespread populations of chemosynthetic organisms occur in these seep assemblages in the deep sea.”

The other aspect of your question, about what oil powers is a very significant part of the answer. Oil was used by many Indian and even prehistoric cultures for various things, but one significant use of petroleum by American Indians was for waterproofing boats so that they could travel and fish in the ocean. Http://
In the late 1800′s whale oil was one of the primary sources of fuel to burn in lamps. Whales were being hunted almost to extinction and if not for the discovery of ways to refine crude oil and produce it whales would probably be a distant memory from the 19th century. Whales would not exist today without oil. Oil powered the industrial revolution and because it was cheaper and more portable than fuels such as electric battery power, vegetable oil, and wood, it became the preferred fuel for things like automobiles, trucks, and trains. Without oil airplanes would likely have never become a significant part of our life because airplanes need a lightweight highly concentrated form of fuel or they simply cannot fly. Oil has been the only fuel that supplied that need. Oil was also key to the outcome of both World War I and especially World War II. In WW2 both the Germans and Japanese eventually lost the war because they could not find enough fuel for their planes, tanks, ships, and factories. Japan was converting tree bark to airplane fuel and the reason for developing kamakaze fighting was that the planes did not have enough fuel to return to base, so a one way flight was the only way they could attack. At that time Texas was the major source of oil in the world and the US was the major exporter of oil in the world. Much of the wealth that built the United States was the result of oil and gas production and the result of supplying much of the world with oil and gas before most other areas had been explored for oil and gas. Oil is the primary fuel used in the transportation sector, powering ships, airplanes, trains, trucks, and cars.

Oil products are quite common parts of our lives. Your computer could not be build without oil. Most of the parts of your computer are electrically insulated, structurally supported, and composed of oil products. Electricity in our homes is dependent on oil compounds to keep the wiring insulated, both in the grid and in the walls of your home. Lubricants made from oil are essential to operating electric motors in everything from your computer, your refrigerator, and wind power generation. Compounds made from oil are essential to building solar electricity generation. Oil is essential to power agricultural equipment, to package food, and natural gas is required to make fertilizer that is used for growing corn to make ethanol. Without the nitrate fertilizer made with natural gas, corn crops would not be good enough to support the world’s present population. The cheap source of fuel that is represented by oil is one of the reasons the world has changed from the agricultural economy of the 1800′s to the present day industrial economy, and even has a key role in making the internet possible, along with all the changes the internet has brought.

Oil is also used for things like building roads (asphalt), making your roof waterproof, pharmaceuticals, tires, fabric, carpeting, vinyl flooring, paint, ink, carpeting, laundry detergent shampoo, makeup, and candles.

Chris asks…

Pacquaio or Mayweather? Which would you choose?

Personally I think pacman will win if they fight. Pacquaio has blinding speed, Mayweather has a ravaging defense.

If you guys don’t know anything about medieval warfare, especially chinese and japanese medieval era war times: Speed beats Defense. Offense beats Speed. Defense beats Offense.

Don’t say anything stupid like terrain advantage, and weather advantage. In the boxing ring? There’s no chilling wind or rocks to trip on.

Windmill Farms answers:


Thomas asks…

where can i find schemetic diagrams of a windmill generators as well a practical way to build one?

what will be the payback if you build one , is it worth it? i am more interested in the engenereeng aspect of this experiment

Windmill Farms answers:

For a wind generator schematic, there is one offered by The National Renewable Energy Laboratory at:


There is also plenty of debate & discussion on the differences & dis/advantages of vertical axis windmills versus regular wind turbines – maybe check out (the introduction to one such article is below):

“Horizontal axis wind turbine technology is likely to peak in the next few years, largely because of the limitations of the blades and their effects on the machine. Instead, we need to look back in history and concentrate on further developing the simpler design of vertical axis windmills. Without the same structural limitations, vertical axis windmills can be produced much larger and so take advantage of significant economies of scale.”

For building your own wind generator or wind turbines, I’d suggest a look at or some other “diy wind power” site – there are plenty to be found with web search.

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