anonymous
  • anonymous
Which of the following statements would best describe how to increase the work done by a heat engine? A. Lower the temperature of the hot reservoir. B. Raise the temperature of the exhaust. C. Lower the temperature of the exhaust. D. Raise the temperature of the cold reservoir. **Not sure!! thank you:)
Physics
schrodinger
  • schrodinger
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Michele_Laino
  • Michele_Laino
the efficiency of a Thermal machine is given by the subsequent formula: \[\eta = 1 - \frac{{{T_2}}}{{{T_1}}}\] where T_1 is the temperature of the hot reservoir and T_2 is the temperature of the cold reservoir
anonymous
  • anonymous
okay! :) so to increase the work done, would we have to lower the temperature of the exhaust? :/
anonymous
  • anonymous
i am not sure :/

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Michele_Laino
  • Michele_Laino
yes! that's right! we have to lower the value of T_2. Please keep in mind that both T_1 and T_2 are absolute temperatures
anonymous
  • anonymous
yay!! :) so choice C it is! thank you!!
Michele_Laino
  • Michele_Laino
yes! Option C thank you!! :)

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