Question

The power rating of a water pump is 4200 watts, if it is run for 600s, how many joules of work will it do in that time?

Answer 1

Given:

$P=4200\:\rm W$

$t=600\:\rm s$

The work done by a power pump

$$W=P*t\\ =\rm 4200\: W*600\: s=2520000\: J=2.52\: MJ$$