What is the cost of operating a 3.00 w electric clock for an entire year if the cost of electricity is $0.0900 per kwh? (b) a large household air conditioner may consume 15.0 kw of power. what is the cost of operating this ac unit 3.00 h per day for 30 days if the cost of electricity is $ 0.110 per kwh? (c) what is the average power consumption in watts of an appliance that uses 5.00 kwh of energy per day?
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Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
What is the cost of operating a 3.00 w electric clock for an entire year if the cost of electricity...
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