Hydraulics & Fluid Mechanics
For a floating body to be in stable equilibrium, its metacentre should be

above the center of gravity.
below the center of buoyancy
above the center of buoyancy
between e.g. and center of pressure

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Hydraulics & Fluid Mechanics
The normal stress is same in all directions at a point in a fluid

When there is no motion of one fluid layer relative to an adjacent layer
only when the fluid is incompressible and has zero viscosity
only when the fluid is frictionless
irrespective of the motion of one fluid layer relative to an adjacent layer

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