Power = energy/time
So by using this equation:
72000/60 = 1200 Watts
Power = work done / time consumed
= 72000/60 = 1200 J/s
= 1200 watt
The power of the hair dryer is calculated using the formula P = t E , which gives P = 1200 W when using 72,000 joules in 60 seconds. This value shows the rate at which the hair dryer uses energy. Thus, the hair dryer has a power rating of 1200 watts.
;