Problem:power calculation explanations
To have a better understanding of tidal power, storage and distribution If the surplus overnight output of a power station is 'stored' by using it to pump water up into a high reservoir.
A).The surplus electrical energy generated during one night is 3 million kilowatt-hours. If 4% of this is lost in the pumping process, calculate the energy available to raise the water and express your answer in (MJ).
B) If the reservoir is 190 m above the intake, how many cubic metres of water will there be delivered during the night?
density of water = 1000 kg m-3
acceleration due to gravity, g = 10 m s-2
C) Show that, if the area of the reservoir is 3.6 km2, its surface level will rise by 1.5 m as a result of the additional volume of water.