a 2 kg laptop sits on the floor near a 4 kg jar of pennies. if the force of gravity between them is 3.42× 10⁻¹⁰ , how far apart
1 answer:
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Answer:
Explanation:
The net work of the cycle is the sum of works in each process.
<u>For the first process 1-2: </u> Let's apply the work definition.
(1)
Now, we need the pressure. We know that pV=C, where C is a constant. Then
So
Let's put p in (1):
Using the first law of thermodynamics we can find Q.
<u>Second process 2-3</u>
In this case, we have a constant volume, so the work done here is 0.
<u>Third process 3-1</u>
Finally, the net work is:
By the conservation of energy:
Because there is no change in total energy.
So:
It is a refrigerator because the net work is negative, it means it consumes energy.
I hope it helps you!