Answer to Question 4
Thermal efficiency = useful work ÷ heat input = 100 J ÷ 825 J = 0.121 Percentage efficiency = 0.121 x 100 = 12.1 %
Thermal efficiency = useful work ÷ heat input
= 100 J ÷ 825 J = 0.121
Percentage efficiency = 0.121 x 100 = 12.1 %
