1. Thot reservoir= 600K, Tcold reservoir= 300K, Output= 0.5 J of work for every J of thermal energy extracted from the hot reservoir. What is Qh? 2. efficiency= W/Qh; Carnot efficiency= 1- (Tcold/Thot); 3. I have found the Carnot efficiency to be 0.50. I don't know where to go after this.