A 750 watt hair dryer is used 15 minutes. calculate the energy used in kwh
To calculate the energy used in kWh, we need to convert the power consumed in watts to kilowatts and then multiply it by the time in hours.
1 kilowatt (kW) = 1000 watts (W)
Energy Used (kWh) = (Power (W) × Time (hours)) / 1000
Given:
Power = 750 watts
Time = 15 minutes = 15/60 hours (since there are 60 minutes in an hour)
So, the energy used in kWh can be calculated as:
Energy Used (kWh) = (750 W × 15/60 hours) / 1000
Energy Used (kWh) = (750 W × 0.25 hours) / 1000
Energy Used (kWh) = 187.5 Wh / 1000
Therefore, the energy used in kWh is 0.1875 kWh.