A hair dryer uses 72,000 joules of energy in 60 seconds. What is the power of this hair dryer?

1200 Watts is the answer
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Answered by stylyjr | 2024-06-14

The** power **of an object is the rate of work done or energy. Here, the energy used by the hair dryer is 72000 Joules. Hence, the power used by the dryer is 1200 watt.
What is power ?
The** power** of an object is a physical quantity that, measures the rate of the **work done **by the object or the energy used by the object. The energy used is equal to the work done by it. Hence both have the same standard unit of joule.
Power is the work done or energy divided by time. Hence, the unit of power is J/s which is equivalent to watt.
hence power = work done or energy / time
Given the energy used by the hair dryer = 72000 Joules
time = 60 seconds.
then, power = 72000 J/60 s = 1200 watt.
Therefore, the** power **used by the dryer is 1200 watt.
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Answered by kanikabajaj294 | 2024-06-17

The power of the hair dryer is calculated using the formula P = t E ​ . Given that it uses 72,000 joules of energy in 60 seconds, the power is found to be 1200 watts. This means the dryer consumes energy at a rate of 1200 joules per second.
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Answered by kanikabajaj294 | 2024-10-06