How many kilowatt- hours of energy does an appliance rated as 5.00 x 102 W and 1.10 x 102 V consume in 15.0 minutes?

To calculate the kilowatt-hours of energy consumed by the appliance, first convert the power rating to kilowatts by dividing by 1000 (5.00 x 10^2 W = 0.500 kW). Then calculate the energy used in kilowatt-hours by multiplying the power in kilowatts by the time in hours (15.0 minutes = 0.25 hours). Therefore, the appliance consumes 0.500 kW x 0.25 hours = 0.125 kWh of energy.