100(work out/heat in)
the heat out to the other system is lost to this problem. Note that it is 110 which is what is left over after you take 40 out of your 150
see
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heaeng.html
We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine?
Please don't give me the answer! Just help figure out how to find it! The description for the lesson with this question was 1 paragraph long :/ so I have no idea what to do! Thank you! :)
2 answers
it PRODUCES 150 J of heat?
Usually one must put heat into an engine to get work out (boil water, burn gas). This is either a typo or a magic trick.
Usually one must put heat into an engine to get work out (boil water, burn gas). This is either a typo or a magic trick.