Through a cycle a heat engine receives 278times104 j of

Question

Through a cycle, a heat engine receives 2.78×10⁴ J of heat from the hot reservoir and gives up 1.83×10⁴ J of heat to the cold reservoir. (a) What is the net work performed through one cycle? Make sure to include the correct sign. (b) Is work done on the system, or does the system do work on its surroundings?