A thermal power station generates electricity at night when it is not needed.
Some of this energy is stored by pumping water up the mountain lake. When
there is a high demand for electricity, the water is allowed to flow back through
turbines to generate electricity.
On one occasion, 2.05 x 105
kg of water is pumped through a vertical height of
500 m. [g=10 m/s2
]
(a) Calculate the weight of water.
(b) Calculate the gravitational potential energy gained by the water.
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Answer:mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
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