I need to know about windmills?
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The link below has some interesting links.
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Wind mills and /or solar
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http://www.karun3.com/technical/?item=7\nhttp://www.karun3.com/related%5Finfo/about%5Fhydro/hydropower%5Fmachinery/
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Yes wind is definitely a renewable energy source. Take a look at the link provided for more info on RES and other examples.
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Thereare tons look under tidal turbines. Here is a site that should help you out. http://www.freeenergynews.com/Directory/Tidal/index.html
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The direction a windmill turns is based solely on the angle of the blades.  The direction of the wind, or which country it is in, has nothing to do with it.\n\nThe blades of a windmill look like the blades of an ordinary fan; they are curved.  As the wind blows across them, they turn in the direction determined by the curvature of the blades.
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http://en.wikipedia.org/wiki/Tidal_energy
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Rotating turbines attached to electrical generators produce most commercially available electricity. Turbines may be driven by using steam, water, wind or other fluids as an intermediate energy carrier. The most common usage is by steam in fossil fuel power plants or nuclear power plants, and by water in hydroelectric dams. Alternately, turbines can be driven directly by the combustion of natural gas or oil. Combined cycle gas turbine plants offer efficiencies of up to 60%. They generate power by burning natural gas in a gas turbine and use residual heat to generate additional electricity from steam. Wind turbines generate electricity by using the wind. Solar chimneys use wind that is artificially produced inside the chimney by heating it with sunlight. Solar parabolic troughs and solar power towers concentrate sunlight to heat a heat transfer fluid that is used to produce steam to turn a turbine. Small electricity generators are often powered by reciprocating engines burning diesel, biogas or natural gas. Diesel engines are often used for back up generation, usually at low voltages. Biogas is often combusted where it is produced, such as a landfill or wastewater treatment plant, with a reciprocating engine or a microturbine, which is a small gas turbine.
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Usually wind harvesters are build in areas with huge winds and occurs throughout the year. You cannot control the wind speed so each collector generates a random amount of energy. For a stable power supply, the energy harvested by each collector is transferred to a storage generator which then collects everything and thus distributes the electrical power in a constant supply to homes. So there is no problem with the erratic wind speed.
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Over here on the Left Coast, on the Altamont Pass, there are windmill farms, wind power electricity generation to cut down on emissions.\n\nEnvironmentalists are suing to shut down the wind farms to stop the massive blades from killing the migratory birds.\n\nUseful idiots.
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Sail boating.  I guess electric companies in CA. they use those huge electricity generating windmills.  Glider manufacturing.  Kite makers although I don't know if you would consider that an industry.
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Have a look at my project.  Several links for pictures, wiring, charge controller, and so on.\nhttp://members.rennlist.org/warren/wind.html
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Modern wind turbines can operate at efficiencies up to about 44% while the theoretical maximum efficiency is about 56%.  Tower height is very important and for a three-bladed system, increasing blade diameter increases power exponentially.  The wind is free but designs are optimized to increase efficiency to produce maximum energy for the installation cost.
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Get a Small DC Motor with Two Wires, and an LED from Radio Shack, then, figure out a way to put a small fan blade on it, and put a small Electric Fan in front of it, blowing Air onto Your small Fan to turn the Motor to demonstrate how a Windmill could power a Generator, and produce Electricity.
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Try this http://www.solarwinds.net/ You can find out a lot about what the tool does.
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It depends on what kind of map you are looking at:\n\nFor instance, a map of historical landmarks might use a windmill to indicate that there actually is a windmill in this location of some historical significance.\n\nOn the other hand, if it is modern in appearance, it could mean that wind is harvested in this location to create electrical power.\n\nDoes the map have a key?
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Wind: Exmample--Maples hae seeds with "wings" line a helicopter, called a samara, that are spread by the wind.\n\nWater: Mangroves produce seeds that are long and pointed, that float down the river and will eventually root.\n\nAnimals: Oaks rpoduce Acorns, some are eaten and others are carried off and planted by squirrels.\n\nFriction: Beggar Lice is a plant that makes seeds that stick to animals walking by.\n\nGood Luck