A heat engine does 300 J of work during one cycle. In this cycle 900 J of energy is wasted.

What is the efficiency of the engine?

A. 0.25

B. 0.33

C. 0.50

D. 0.75

Respuesta :

DGOTTI
b, because 300 is 1/3 of 900

The efficiency of the engine is 0.33

The calculation can be done as follows

the engine does 300 joules of work during one cycle

during this cycle 900 joules is lost

Efficiency= 300/900

= 0.33

Hence the efficiency of the engine is 0.33

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