A heat engine operating in outer space may be assumed equivalent to a Carnot eng

ID: 1847076 • Letter: A

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A heat engine operating in outer space may be assumed equivalent to a Carnot engine operating between reservoirs at temperatures TH and Tc The only way heat can be discarded from the engine is by radiation, the rate of which is given (approximately) by: Qc = kA(Tc^4) Prove that, for fixed power output and for fixed temperature TH, the radiator area A is a minimum when the temperature ratio Tc/TH is 0.75 A heat engine operating in outer space may be assumed equivalent to a Carnot engine operating between reservoirs at temperatures TH and Tc The only way heat can be discarded from the engine is by radiation, the rate of which is given (approximately) by: Qc = kA(Tc^4) Prove that, for fixed power output and for fixed temperature TH, the radiator area A is a minimum when the temperature ratio Tc/TH is 0.75

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A heat engine operating between temperatures of 500 K and 300 Kis used to lift a

A heat engine performs the reversible cycle abca with9.0 moles of an ideal gas.

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A heat engine operating in outer space may be assumed equivalent to a Carnot eng

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