Physics, 31.07.2019 19:10 edmundg2238
20. a car battery with a 12-v emf and an internal resistance of 0.050 ω is being charged with a current of 60 a. note that in this process, the battery is being charged. (a) what is the potential difference across its terminals? (b) at what rate is thermal energy being dissipated in the battery? (c) at what rate is electric energy being converted into chemical energy
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Do you agree with scientist’s prediction about the warming of alaska and other polar regions?
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An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm
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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.
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20. a car battery with a 12-v emf and an internal resistance of 0.050 ω is being charged with a curr...
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