Question: Due to design changes, the efficiency of an engine increases from 0 . 2 8 to 0 . 4 9 . For the same heat

Due to design changes, the efficiency of an engine increases from

0.28

0.49 .

For the same heat input

Q_{H},

these changes increase the work done by the more efficient engine and reduce the amount of heat rejected to the cold reservoir. Find the ratio of the heat rejected to the cold reservoir for the improved engine to that for the original engine.

Number

Units

Due to design changes, the efficiency of an

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