3 years ago

What does it mean when work is positive?

Physics

2 answers:

solniwko [45]3 years ago

8 0

Answer:

O The environment did work on an object

Explanation:

Schach [20]3 years ago

5 0

Answer: I think it may be Kinetic energy is greater than velocity

Explanation:

I just had this ? on edge but can’t see my test answers since it was a unit test but i got a 96 so I think I may of gotten it right

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3 years ago

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Explanation:

Formula for maximum efficiency of a Carnot refrigerator is as follows.

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And, formula for maximum efficiency of Carnot refrigerator is as follows.

$\frac{W}{Q_{C_{2}}} = \frac{T_{H_{2}} - T_{C_{2}}}{T_{C_{2}}}$ ...... (2)

Now, equating both equations (1) and (2) as follows.

$Q_{C_{2}} \frac{T_{H_{2}} - T_{C_{2}}}{T_{C_{2}}}$ = $Q_{H_{1}} \frac{T_{H_{1}} - T_{C_{1}}}{T_{H_{1}}}$

$\gamma = \frac{Q_{C_{2}}}{Q_{H_{1}}}$

= $\frac{T_{C_{2}}}{T_{H_{1}}} (\frac{T_{H_{1}} - T_{C_{1}}}{T_{H_{2}} - T_{C_{2}}})$

= $\frac{250}{600} (\frac{(600 - 300)K}{300 K - 250 K})$

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