if it takes 15 minutes to dry your hair with a 1.200 kW Hair dryer, how much energy is used in drying your hair?
To calculate the energy used in drying your hair, we need to first convert the time from minutes to hours:
15 minutes = 15/60 hours = 0.25 hours
Next, we can use the formula:
Energy = Power x Time
Energy = 1.200 kW x 0.25 hours = 0.3 kWh
Therefore, 0.3 kilowatt-hours (kWh) of energy is used in drying your hair.