Fluid Mechanics
The distance between metacentre and __________ is called metacentric height.

Centre of gravity
None of these
Water surface
Centre of buoyancy

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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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Fluid Mechanics
The Prandtl mixing length is

Independent of the shear stress
Zero at the pipe wall and is a universal constant
Independent of radial distance from the pipe axis
Useful for computing laminar flow problems

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