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ladessa [460]
4 years ago
12

Please Help!!! An engine takes 3,000 J from a hot reservoir and expels 2,400 J to a cold reservoir. What is the thermal efficien

cy of the engine? 20% 45% 60% 80%
Physics
1 answer:
Murljashka [212]4 years ago
4 0

Answer:

80%

Explanation:

Thermal efficiency is a measure of the extent to which a heat engine is able to convert to other form. It is measure in percentage.

Thermal efficiency = \frac{E_{out} }{E_{in} } × 100%

Where E_{in} is the input energy and E_{out} is the output energy.

Given that: E_{in} = 2400 J and  E_{out} = 3000 J, therefore:

Thermal efficiency = \frac{2400}{3000} × 100%

                               = 80%

The thermal efficiency of the engine is 80%.

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