If steam enters a turbine at 600°k and is exhausted at 200°k, calculate the efficiency of the engine.

If in you machine you put some heat X, the machine will return some work W and some heat Y. In this case, X = 600k and Y = 200k.

The efficiency of a machine is the ratio of heat transformed into work, so

E = W/X = 1 - Y/X = 1 - 200/600 = 1 - 1/3 = 0.66.

So the efficiency of the turbine is of the 66%

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb