Question

A 750-watt hairdryer is used for 60 seconds. How many joules of energy are used?

Answer 1

Answer:

engergy = 750 W

time = 60 sec

rate of doing a work is called power

engrgy = power × time

750W = power × 60 sec

power = 750 / 60 J

power = 25 / 2 = 12.5 J

so 12.5 J of power is used

hope it help

Answer 2

Answer:

no answer OK byy good morning