Question: Why is a wind turbine not 100% efficient? a. It cannot extract all the mechanical energy from air. b. It blocks the motion of air

Why is a wind turbine not 100% efficient? 


a. It cannot extract all the mechanical energy from air. 


b. It blocks the motion of air entirely. 


c. Air cannot pass through its blades. 


d. It cannot extract all the kinetic energy from air.

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