Question

In each cycle, a heat engine performs 710 J of work and exhausts 1480 J of heat. What is the thermal efficiency?

A) 0.24
B) 0.47
C) 1.7
D) 0.32

Answer 1

D) 0.32

Step-by-step explanation:

The computation of the thermal efficiency is given below:

Thermal efficiency is

= 710 J ÷ (710 J + 1480 J)

= 710 J ÷ 2,190 J

= 0.32

Hence, the thermal efficiency is 0.32

Therefore the last option is correct