1.

Calculate the power of the pump which can lift 100 kg of water to store in a water tank atthe height of 19 m in 25 sec. (take the value of g-10 m/ )Describe two methods used to reduce the friction between two surfaces.

Answer»

Power=work/time

Work(in this case)=mgh(work done=energy consumed)

Because we need to raise the water

So power=mgh/t

Power=100*10*19/25

Power=760W

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