Answer:
(i) Power is defined as the rate of doing work or the rate
of transfer of energy. The unit of power is watt or kilowatt. [1 kW= 1000W]
(ii) Kilowatt is the unit of power while kilowatt hour is
bigger unit of energy
kWh = 1000 x 3600 1 kilowatt hour
(iii) Given, mass of water = 2000 tonnes
Mass
of water
We know that, power
[given, h = 20 m and g = 10 ]
This
power can be utilized.
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