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For a particular heat engine, $3,000\ J$ of energy goes in at $700\ K$ and $2000\ J$ comes out at $200\ K$. The rest of the energy is used to do useful work.

What is the actual efficiency of this engine?

A

0.71

B

0.33

C

0.67

D

0.29

E

1.5

Accuracy 0%
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