Hydraulics & Fluid Mechanics
Fluid is a substance that

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

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

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

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