Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

2A × (√H3/2 - √H3/2)/Cd × a × √(2g)
2A × (√H₁ - √H₂)/Cd × a × √(2g)
2A × √H₂/Cd × a × √(2g)
2A × √H₁/Cd × a × √(2g)

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be uniform when

The liquid particles at different sections have different velocities
The liquid particles at all sections have the same velocities
The quantity of liquid flowing per second is constant
Each liquid particle has a definite path

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