Question

A eletric oven. It rated 2500 watts .How many unit of energy does it use in 4hours

Answer 1

power = 2500 watt
time = 4 hours = 4×60×60
=14400 seconds
power = energy/ time
energy = p × t
= 2500× 14400
= 36000000 joules

so, energy used by electric oven rated 2500 watt in 4 hours is 36000000 joules......
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