A vertical U-shaped tube is filled with a liquid of density ρ and the right end of the tube is sealed with a stopper, as shown in the left figure. Some of the liquid is removed from the left column with a syringe and the left column descends a distance d, while the right column remains as it was. Refer to the right figure. 1) Three students are debating: Student A: The pressure at level C must now be greater than the atmospheric pressure because liquid there is being pushed up against the stopper. Student B: I think the pressure at level B must be the same as at level A, because they are at the same level. Both are at atmospheric pressure. So the pressure at level C must be lower than atmospheric, because pressure decreases as you ascend. Student C: But the liquid is denser than air, so the pressure at C cannot be less than atmospheric pressure. With which student(s) should you agree? 2
A vertical U-shaped tube is filled with a liquid of density ρ and the right end of the tube is sealed with a stopper, as shown in the left figure. Some of the liquid is removed from the left column with a syringe and the left column descends a distance d, while the right column remains as it was. Refer to the right figure.
1)
Three students are debating:
Student A: The pressure at level C must now be greater than the atmospheric pressure because liquid there is being pushed up against the stopper.
Student B: I think the pressure at level B must be the same as at level A, because they are at the same level. Both are at atmospheric pressure. So the pressure at level C must be lower than atmospheric, because pressure decreases as you ascend.
Student C: But the liquid is denser than air, so the pressure at C cannot be less than atmospheric pressure.
With which student(s) should you agree?
2
![The image depicts two connected U-shaped tubes filled with liquid. Both sections are capped at the top. In the setup, the left tube has a consistent liquid level, while the right side shows a difference in the liquid level, marked by three labels:
- **Point A**: Indicates the lower level of the liquid on the right tube.
- **Point B**: Indicates the higher level of the liquid on the right tube.
- **Point C**: Denotes the top of the tube on the right side.
- **d**: Represents the vertical distance between the liquid levels at points A and B.
This setup can be used to demonstrate principles such as hydrostatic pressure, Pascal's Law, or capillary action, depending on the context provided in related educational materials.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F31f59ff4-c1b6-4bfe-b48e-f376b2b8e1ed%2F71525644-cfca-466c-951e-0c7604169172%2F48x8di6_processed.png&w=3840&q=75)
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Calculate the pressure difference, in pascals, between levels C and A, ΔP = PC - PA, for ρ = 0.93×103 kg/m3 and d = 2 cm
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