Aheat engine uses thermal energy flowing from a heat source that is 225k to a cold sink that is 50k. what is the approximate efficiency of that heat engine?

efficiency of heat engine is given as

now we know that

= temperature of sink

= temperature of high temperature source

now it is given that

now from the given equation we have

so efficiency of heat engine will be 78%

C) 78%

Explanation:

edge

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

this is a good question! i'll do some research and come back when i have the answer!