A hair dryer uses 75,000 joules of energy in 60 seconds. What is the power of this hair dryer?

1 Answer
Gió
Jun 7, 2015

Power is the rate of transfer of energy with time or, more simply, the energy transferred in 1 second. In your case:

Power#=75000/60=1250 W#

(Power is measured in Watt, #W#, which has units of Joules/seconds)

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