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b. Seawater is trapped behind a dam at high tide and then released through turbines. The level of the water trapped by the dam falls 10.0 m until it is all at the same height as the sea.
i. Calculate the mass of seawater covering an area of 1.4 x 106 m2 and with a depth of 10.0 m.
(Density of seawater = 1030 kg m^-3)
ii. Calculate the maximum loss of potential energy of the seawater in i when passed through the turbines.
iii. The potential energy of the seawater, calculated in ii, is lost over a period of 6.0 hours.
Estimate the average power output of the power station over this time period, given that the efficiency of the power station is 50%.
50 points plus brainliest
Sagot :
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