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Lelu [443]
3 years ago
15

A certain heat engine does 30.2 kJ of work and dissipates 9.14 kJ of waste heat in a cyclical process.

Physics
1 answer:
valina [46]3 years ago
4 0

Answer:

a) H_{in}=39.34 kJ

b) Efficiency=76.77%

Explanation:

a)

In order to solve this problem, we can use the following formula:

H_{in}=H_{out}+W

the problem provides us with all the necessary information so we can directly use the formula:

H_{in}=9.14kJ+30.2kJ

H_{in}=39.34 kJ

b) In order to find the efficiency, we can use the following formula:

Efficiency=\frac{W}{H_{in}}*100\%

so we get:

Efficiency=\frac{30.2kJ}{39.34kJ}*100\%

Efficiency=76.77%

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