I was reading about the Carnot engine, and I stumbled upon this forumla:
Carnot efficiency = 1 - (QH-QL)/QH = 1 - (TH-TL)/TH
Where QH is the heat input, QL is the heat output, TH is the input temperature, TL is the output temperature.
The book says that TH is proportional to QH, and TL...