Fluid Mechanics
Transition from laminar flow to turbulent flow is aided by the

All of these
Pressure gradient and the compressibility of the flowing medium
Vibration
Surface roughness and curvature (i.e.sharp corners)

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Fluid Mechanics
The continuity equation

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
Relates work and energy
None of these

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