Question

a hydroelectric power station takes its water from a lake whose water level is at height of 50 metre above the turbine . assuming an overall efficiency of 40% calculate the mass of water which must flow through the turbine each second to produce water output of 1MW . ( take g = 10 ms-² )


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Answer 1

Answer:

5000kg.

Explanation:

P.E=mgh

P.E=m×10×50=500×mJ

40 % of this is equal to (0.4)500×m=200×m

Power=work/time  1×10^6  =200×m/1sec

m=10 ^6  /200=5000kg

Hence there is a mass of 5000kg.

Answer 2

Answer:

step by step solution are given in image