JOHN MEAD / SCIENCE PHOTO LIBRARY JOHN MEAD / SCIENCE PHOTO LIBRARY
Wind Turbines. View of a wind farm with several wind turbines each with 3 spinning rotor blades. Wind power is used to drive a turbine for the generation of electricity. The electrical energy produced from a turbine is proportional to the cube of the windspeed. Thus, a 10 metre per second wind will produce 8 times more energy than a 5 metre per second wind. Wind turbines vary in size from large generators with a 1-3 megawatt capacity to small machines producing only a few kilowatts. Photographed at Palm Springs, California, America.
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