Mass velocity is independent of temperature & pressure, when the flow

1.	Mass velocity is independent of temperature & pressure, when the flow is
A.	unsteady through unchanged cross-section.
B.	steady through changing cross-section.
C.	steady and the cross-section is unchanged.
D.	unsteady and the cross-section is changed.
Answer» D. unsteady and the cross-section is changed.

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Mass velocity is independent of temperature & pressure, when the flow is

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