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What does the Continuity Equation describe in fluid mechanics?

9. What does the Continuity Equation describe in fluid mechanics?

1. The conservation of momentum in a fluid flow
2. The conservation of energy in a fluid flow
3. The conservation of mass in a fluid flow
4. The conservation of angular momentum in a fluid flow

Answer: C) The conservation of mass in a fluid flow

Explanation:

The Continuity Equation ensures that the mass entering a control volume must equal the mass exiting the control volume in a steady flow.