Compare the energy consumption of two commonly used items in the household. Calculate the energy used by a 1.00 kW toaster oven, Wtoaster, which is used for 5.80 minutes, and then calculate the amount of energy that an 11.0 W compact fluorescent light (CFL) bulb, Wight, uses when left on for 10.50 hours.

In recent years, practical hybrid cars have hit the road—cars in which the gasoline engine runs a generator that charges batteries that run an electric motor. These cars offer increased efficiency, but significantly greater efficiency could be provided by a purely electric car run by batteries that you charge by plugging into an electric outlet in your house.But there’s a practical problem with such vehicles: the time necessary to recharge the batteries. If you refuel your car with gas at the pump, you add 130 MJ of energy per gallon. If you add 20 gallons, you add a total of 2.6 GJ in about 5 minutes. That’s a lot of energy in a short time; the electric system of your house simply can’t provide power at this rate.There’s another snag as well. Suppose there were electric filling stations that could provide very high currents to recharge your electric car. Conventional batteries can’t recharge very quickly; it would still take longer for a recharge than to refill with gas.One possible…

consume in 1 hour? J (b) A color television set draws about 2.6 A when connected to 120 V. How much time is required for it to consume the same energy as the black-and-white model consumes in 1 hour?

Midterm Practice A conventional light bulb running at 40 W for 4 hours per day. How much energy does it spend in one month?   Select one: a. 480.0 kwh b. 4.800 kwh c. 0.480 kwh d. 4800 kwh e. 48.00 kwh