Power = (work) divided by (time to do the work)
500 joule/sec = (1.5 x 10⁵ J) / (time)
Multiply each side
by time: (time) x (500 joule/sec) = 1.5 x 10⁵ J
Divide each side
by 500 J/sec: Time = (1.5 x 10⁵ J) / (500 J/sec)
= (1.5 x 10⁵ / 500) (J-sec/J)
= 300 sec
= 5 minutes .
