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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| Question | |
C | 10 |
I | |
Question John rapidly pulls a plunger out of a cylinder. As the plunger moves away, the gas molecules bouncing elastically off the plunger are: | |
Answer rebounding at a lower speed than they would have if the plunger weren't removed. | |
Notes
| User | Added | Note | e | d |
|---|---|---|---|---|
| KillGorack | 2023-07-04 10:37:13 | When John pulls the plunger rapidly out of a cylinder, it increases the volume inside the cylinder. According to the ideal gas law (PV=nRT), if the number of gas molecules (n), the gas constant (R), and the temperature (T) remain constant, an increase in volume (V) will cause a decrease in pressure (P). Therefore, the pressure inside the cylinder will be lower. In terms of the behavior of the gas molecules, when the plunger is pulled out, it reduces the frequency at which gas molecules hit the walls of the cylinder (including the plunger). This reduction in collision frequency corresponds to a reduction in pressure, as pressure is essentially the force exerted by gas molecules colliding with the walls of their container. In essence, as the plunger moves away, the gas molecules have more space to move around, leading to fewer collisions with the plunger and the walls of the cylinder, resulting in a decrease in pressure. |
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