Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (3/2) × (dH/H)
dQ/Q = (1/2) × (dH/H)
dQ/Q = (dH/H)
dQ/Q = (3/4) × (dH/H)

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Hydraulics and Fluid Mechanics in ME
When a liquid is flowing through a pipe, the velocity of the liquid is

Maximum at the centre and minimum near the walls
Maximum at the centre and zero near the walls
Minimum at the centre and maximum near the walls
Zero at the centre and maximum near the walls

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