A 3kilowatt oven supplied with 9mj, how long can it be ran for

The basic definition or formula for this condition is 1 watt = 1 joule / second

The formula is W = J/T

W = watts

J = joules

T = Time = ?

Givens

W = 3 kW = 3000 W

J = 9 megaJoules = 9 * 10^6 Joules

T = time in seconds.

Solution

3000 = 9 * 10^6 / T Multiply both sides by T

3000*T = 9*10^6 Divide by 3000

T = 9*10^6 / 3000 = 3000 seconds which is 5/6 of an hour. Answer