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Posted by on Friday, December 10, 2010 at 11:15pm.

An engineer claims to have measured the characteristics of a heat engine that takes in 130J of thermal energy and produces 40J of useful work.

What is the smallest possible ratio of the temperatures (in kelvin) of the hot and cold reservoirs?

  • Physics - , Saturday, December 11, 2010 at 3:38am

    That would be whatever carnot cycle yields an efficiency of 4/13 = 30.8%

    1 - T2/T1 = 0.308

    T2/T1 = ?

  • Physics - , Thursday, November 29, 2012 at 1:15am

    TH/TC=(1)/(1-0.308)

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