Physics: If a gasoline engine has an efficiency of 21 percent and losses 780 j to the cooling system and exhaust during each cycle, how much work is done by the engine?

If a gasoline engine has an efficiency of 21 percent

Ответ:

kim95207

17.01.2022

Physics

As we know that efficiency of engine is given as

$efficiency = \frac{W}{Q_i}$

also we know that

Q_i - Q_o = W

given that

Q_o = 780 J

efficiency = 21%

now we have

$0.21 = \frac{Q_i - Q_o}{Q_i}$

0.21 Q_i = Q_i - 780

0.79Q_i = 780

Q_i =987.3J

now we have

W = 987.3 - 780 = 207.3 J

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Ответ:

abtj4r7668g

14.12.2022

Physics

Compressing the air makes the molecules move more rapidly, which increases the temperature. This phenomenon is called “heat of compression”. Compressing air is literally to force it into a smaller space and as a result bringing the molecules closer to each other.

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If a gasoline engine has an efficiency of 21 percent and losses 780 j to the cooling system and exhaust during each cycle, how much work is done by the engine?

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