---
title: "In the context of fluid dynamics, what does the term ‘mass flow rate’ represent in the continuity equation?"
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date_modified: "2026-08-18T02:38:45+00:00"
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# In the context of fluid dynamics, what does the term ‘mass flow rate’ represent in the continuity equation?

In the context of fluid dynamics, what does the term ‘mass flow rate’ represent in the continuity equation?

- **A.** The total volume of the fluid contained within a pipe.
- **B.** The acceleration of fluid particles as they enter a narrower region.
- **C.** The force per unit area exerted by the moving fluid on the pipe walls.
- **D.** The amount of mass passing through a cross-section per unit of time.

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