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The continuity equation states that for an incompressible fluid in a streamtube:

Q: The continuity equation states that for an incompressible fluid in a streamtube:

Area × velocity = constant (mass flow is conserved). The continuity equation (A1V1 = A2V2) shows that when a streamtube narrows, velocity must increase to maintain constant mass flow.

Pressure × velocity = constant

Area × velocity = constant (mass flow is conserved)

Density × pressure = constant

Velocity × temperature = constant

Area × velocity = constant (mass flow is conserved)✓ Correct Answer

Explanation

The continuity equation (A1V1 = A2V2) shows that when a streamtube narrows, velocity must increase to maintain constant mass flow.

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