Physics
Yanda204
6

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.

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