Help compute for the heat input

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A heat engine of efficiency 0.52 performs 780 J of useful work per cycle.What is the heat input per cycle?

Oct 22nd, 2015

Thank you for the opportunity to help you with your question!

eta = .52

heat output: 780

heat input = output/(1-eta) = 780/.48 = 1625 J :)

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 22nd, 2015

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