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# Temperature of Expelled Heat

SATPHY-XYXEK4

The Carnot efficiency of a heat engine is $75\%$.

If heat is taken in at a temperature of $800\ K$, at what temperature is it expelled?

A

$600\ K$

B

$1067\ K$

C

$200\ K$

D

$1000\ K$

E

$100\ K$