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31 December, 08:24

An aircraft engine takes in 8950 J of heat and discards 6150 J each cycle. Part A)

What is the mechanical work output of the engine during one cycle?

Part B)

What is the thermal efficiency of the engine?

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Answers (1)
  1. 31 December, 09:33
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    (a) 2800 J

    (b) 31.28 %

    Explanation:

    Heat intake, Q1 = 8950 J

    Heat discard, Q2 = 6150 J

    (a) Work = intake heat energy - discarded heat energy

    W = Q1 - Q2 = 8950 - 6150 = 2800 J

    (b) Efficiency = 1 - Q2 / Q1

    Efficiency = 1 - (6150 / 8950) = 0.3128 = 31.28%
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