Solar Energy: An Alternative Energy

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Written by:

Kristie I


Date added:

February 21, 2016








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2 / 288


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The amount of energy at the solar constant, which is at outer edge of the earth's atmosphere, is two calories per minute per cm squared. A calorie is the amount of energy needed to raise one gram of water one degree Celsius. If we could efficiently harness the energy bombarding the earth for twenty-four hours we could power New York for a year...
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Unfortunately the photovoltaic cells that change the energy into electricity are so inefficient that it would take twenty-five years to pay for it's self in output. There many uses of solar energy. Some homes rely fully on the power of the sun to heat their water. Other houses have flat plate collectors which aid in the heating of the house and water...
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