a hair curling iron uses 13 watts of power. how long must it operate to do 1,040 joules of work?

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(2) Answers

karla519

Knowing the solution to the 4-watt night light, you ought to be able to do this one on your own. But 5 points is 5 points, so here we go:
1 watt = 1 joule/second .
(1,040 joule) / (13 joule/second)
= (1,040 / 13) (second)
= 80 seconds .

rekeyia21

Power of Watt = Energy in Joules / Time period in seconds
13 watts = 1040 joules / time in seconds
time in seconds = 1040 joules / 13 watts
time in seconds = 80 seconds
It must operate for 80 seconds to do 1,040 joules of work.