---
title: "Consider a U-shaped tube open to the atmosphere on both ends, filled with an ideal fluid. If a piston of mass \\( M \\) and area \\( A \\) is placed on the right arm, what is the difference in height \\( \\Delta h \\) between the fluid levels in the two arms?"
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url: "https://nerd-notes.com/ubq/107124/"
date_modified: "2026-08-18T02:38:31+00:00"
---

# Consider a U-shaped tube open to the atmosphere on both ends, filled with an ideal fluid. If a piston of mass \( M \) and area \( A \) is placed on the right arm, what is the difference in height \( \Delta h \) between the fluid levels in the two arms?

Consider a U-shaped tube open to the atmosphere on both ends, filled with an ideal fluid. If a piston of mass \( M \) and area \( A \) is placed on the right arm, what is the difference in height \( \Delta h \) between the fluid levels in the two arms?

- **A.** \[ \Delta h = \frac{ M g }{ \rho A } \]
- **B.** \[ \Delta h = \frac{ M }{ \rho A } \]
- **C.** \[ \Delta h = 0 \]
- **D.** \[ \Delta h = \frac{ \rho A }{ M } \]

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/107124/*