E-CET Quiz
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Has coal's contribution to the overall energy consumption gone up or down?
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Since 1980, the contribution of hydroelectric, geothermal, wind, and solar has:
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Since 1980 the world energy consumption of fossil fuels has:
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US uses annually about:
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Hydrogen gas, by weight, has a higher energy density than gasoline
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Hydrogen can dissipate more rapidly than natural gas
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In California Coal is the main source for generation of electricity.
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Wind Turbines can be as tall as 1000 ft.
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The first spacecraft to use solar cells and still in orbit around Earth is:
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Manufacturing batteries for electric cars can pollute the environment:
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The Standard Unit of Energy is:
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The average score is 60%
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