1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Efficiency homework help

  1. Feb 19, 2006 #1
    In one cycle, a heat engine absorbs 520J from the high-tempt reservoir and expels 390J to a low-tempt. reservoir. If the efficiency of this engine is 68% of the efficiency of a Carnot engine, what is the ratio of the low tempt. to the high tempt. in the Carnot engine?

    e=1-(390/520)=.25 Carnot engine
    e=.68*.25=.17 e=.25+.17=.42

    Is this correct?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted