How long does it take a 1.51 * 104 W steam engine to do 8.72 * 106 J of work? Round your answer to three significant figures.

The steam engine does 1.51 x 10⁴ joules of work per second.

To do 8.72 x 10⁶ joules of work takes it

8.72 x 10⁶ Joules / 1.51 x 10⁴ J/sec

= (8.72 / 1.51) x 10² seconds

= 5.77 x 10² seconds

= 577 seconds = 9 minutes 37 seconds