Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H

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Hydraulics and Fluid Mechanics in ME
A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

l/d² = (l₁/d₁²) + (l₂/d₂²) + (l₃/d₃²)
l/d⁴ = (l₁/d₁⁴) + (l₂/d₂⁴) + (l₃/d₃⁴)
l/d³ = (l₁/d₁³) + (l₂/d₂³) + (l₃/d₃³)
l/d⁵ = (l₁/d₁⁵) + (l₂/d₂⁵) + (l₃/d₃⁵)

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Hydraulics and Fluid Mechanics in ME
Slip of a reciprocating pump is defined as the

Difference of theoretical discharge and the actual discharge
Sum of actual discharge and the theoretical discharge
Product of theoretical discharge and the actual discharge
Ratio of actual discharge to the theoretical discharge

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