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1 February, 05:50

A water pump pumps 3 kg of water every second from the bottom of a well to the top of the well 50 m above if the pump used 2000 W of electrical power to accomplish the task what is the efficiency of the pump

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  1. 1 February, 06:05
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    watts = work per second.

    work is mgh = 3x10x50=1500

    watts out = 1500

    Watts used = 2000

    eff=1500/2000=75%
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