(a) A particular household uses a 2.2-kW heater 2.0 h/day
Chapter 18, Problem 66GP(choose chapter or problem)
Problem 66GP
(a) A particular household uses a 2.2-kW heater 2.0 h/day (“on” time), four 100-W lightbulbs 6.0 h/day, a 3.0-kW electric stove element for a total of 1.0 h/day, and miscellaneous power amounting to 2.0 kWh/day. If electricity costs $0.115 per kWh, what will be their monthly bill (30 d)? (b) How much coal (which produces 7500 kcal/kg ) must be burned by a 35%-efficient power plant to provide the yearly needs of this household?
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