Physics, 07.03.2020 04:48 jewlbug4358

A particular household uses a 2.2-kW heater 1.5 h/day ("on" time), four 75-W lightbulbs 5.0 h/day , a 2.5-kW electric stove element for a total of 1.0 h/day , and miscellaneous power amounting to 2.3 kWh/day.

a. If electricity costs $0.105 per kWh, what will be their monthly bill (30 days)?

b. How much coal (which produces 7500 kcal/kg) must be burned by a 37 % -efficient power plant to provide the yearly needs of this household?

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A particular household uses a 2.2-kW heater 1.5 h/day ("on" time), four 75-W lightbulbs 5.0 h/day ,...