First slide

Heat engine

Question

An engine works between two temperatures 227°C and 27°C. The efficiency of the engine is:

Easy

A

40%
B

60%
C

80%
D

100%

Solution

$η = 1 - \frac{T_{2}}{T_{1}} = 1 - \frac{300}{500} = 0.4 = 40 %$

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