Question: A one-ton window air conditioner (12 000 Btu/ h) is installed in a mobile home. If all the following appliances were operating for one hour, what fraction of the unit's capacity would be needed to remove the heat generated by four 150 W lamps, six 100 W lamps, two 75 W lamps, a 500 W refrigerator, an 900 Woven, and four people watching TV (120 W)? How many kilowatt-hours of electric energy are used during each hour for these conditions? What is the hourly cost to the mobile home owner if electricity costs $0.10/ kWh? Note: The average heat output of a person at rest is 480 Btu/h.