일반물리학 1 — Entropy and the Second Law of Thermodynamics: Problem 11

11 Figure 20-20 represents a Carnot engine that works between temperatures \(T_1 = 500\text{ K}\) and \(T_2 = 130\text{ K}\) and drives a Carnot refrigerator that works between temperatures \(T_3 = 360\text{ K}\) and \(T_4 = 200\text{ K}\). What is the ratio \(Q_3/Q_1\)?