Fluid Mechanics
Unsteady uniform flow is represented by flow through a/an

Expanding tube at constant rate
Long pipe at constant rate
Long pipe at decreasing rate
Expanding tube at increasing rate

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Fluid Mechanics
The continuity equation

None of these
Relates work and energy
Stipulates that Newton's second law of motion must be satisfied at every point in the fluid
Relates mass flow rate along a stream tube

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