Hydraulics and Fluid Mechanics in ME
The flow rate in gear pump

Unpredictable
More or less remains constant with increase in pressure
Increases with increase in pressure
Decreases with increase in pressure

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach)

(2/3) Cd × L.√2g [H12 - Ha2]
(2/3) Cd × L. √2g [H13/2 - Ha3/2]
(2/3) Cd × L.√2g [H1 - Ha]
(2/3) Cd × L. √2g [H15/2 - Ha5/2]

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