Most hydroelectric power plants have underground reservoirs of steam and hot water, a gate or valve to control how much water flows out of the reservoir, and an outlet or place where the water ends up after flowing downward. Water gains potential energy just before it spills over the top of a dam or flows down a hill.
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Answer:
Most hydroelectric power plants have underground reservoirs of steam and hot water, a gate or valve to control how much water flows out of the reservoir, and an outlet or place where the water ends up after flowing downward. Water gains potential energy just before it spills over the top of a dam or flows down a hill.