Suppose that on average you use 10 incandescent light bulbs, each rated at 100W, to provide lighting at home: a. What is the average power usage when the lights are on? b. If your average usage time is 10 hrs/day, what is the energy consumed each day? c. If the cost of electricity is $0.12/kWh, what are the monthly and the annual costs of the lighting? d. The compact fluorescent lamps (CFL), equivalent in illumination to the 100W incandescent bulbs, use about 25W. What would your annual savings be if you switched from incandescents to CFLs?
answer all sections of question
|
