The higher the altitude the more slowly windmills rotate at the same wind speed. Which one of the following is the best reason why the blades of windmills rotate More slowly in higher places at the same wind speed? 1. *
1 point
(a) The air is less dense as altitude increases.
(b) The temperature is lower as altitude increases.
(c) Gravity becomes less as altitude increases.
(d) It rains more often as altitude increases.
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The correct answer is (a) the air is less dense as the altitude increases.