Hydraulics & Fluid Mechanics
Fluid is a substance that

always expands until it fills any container
has the same shear stress.at a point regardless of its motion
cannot remain at rest under action of any shear force
cannot be subjected to shear forces

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Hydraulics & Fluid Mechanics
According to Bernoulli’s equation for steady ideal fluid flow

velocity and pressure are inversely proportional
the energy is constant along a stream-line but may vary across streamlines
total energy is constant throughout
principle of conservation of mass holds

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