---
title: "A U-tube contains a liquid of density \\( \\rho \\). One arm of the U-tube is sealed, trapping a volume of air, while the other arm remains open to the atmosphere. Initially, the liquid levels are equal. If more of the same liquid is added to the open arm, how will the new equilibrium levels compare?"
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url: "https://nerd-notes.com/ubq/107135/"
date_modified: "2026-08-18T02:38:32+00:00"
---

# A U-tube contains a liquid of density \( \rho \). One arm of the U-tube is sealed, trapping a volume of air, while the other arm remains open to the atmosphere. Initially, the liquid levels are equal. If more of the same liquid is added to the open arm, how will the new equilibrium levels compare?

A U-tube contains a liquid of density \( \rho \). One arm of the U-tube is sealed, trapping a volume of air, while the other arm remains open to the atmosphere. Initially, the liquid levels are equal. If more of the same liquid is added to the open arm, how will the new equilibrium levels compare?

- **A.** The level in the sealed arm will be higher than the level in the open arm.
- **B.** The levels will remain equal in both arms.
- **C.** The liquid will not enter the sealed arm at all.
- **D.** The level in the open arm will be higher than the level in the sealed arm.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/107135/*