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| By the year 2020, wind energy has the potential to provide how much of the world’s total electricity demand? |
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| The typical size of a wind turbine at the beginning of the 21st century was: |
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| The largest wind turbine in the world is |
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| Global winds are formed because of: |
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| Uneven heating of air masses by the sun |
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| Local winds, sea breezes form because of: |
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| Difference in heat capacities between land and water |
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| The energy of wind is proportional to |
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| Third power of wind velocity |
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| The maximum theoretical efficiency of a wind turbine is defined by: |
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| Energy from a wind turbine is dependent on |
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| Wind turbines are producing (type of electricity) |
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| At 150 m from a typical wind turbine, the noise is roughly: |
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