A heat engine has an efficiency of 35.0% and its power output is 600 W.What is the rate of heat input?
A) 1.8 kW.
B) 2.0 kW.
C) 2.4 kW.
D) 3.0 kW.

Name: A heat engine has an efficiency of 35.0% and its power output is 600 W.What is the rate of heat input? A) 1.8 kW. B) 2.0 kW. C) 2.4 kW. D) 3.0 kW.
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Question

Quizplus · Accepted Answer

Efficiency = (useful energy output / total energy input) x 100%
35% = (600 / heat input) *100%
Heat input = 600 / (35/100) = 1714.29 W = 1.71429 kW (approx)
Thus, the nearest option is 2.4 kW (Option C)

A Heat Engine Has an Efficiency of 35