Hydraulics and Fluid Mechanics in ME
The increase of temperature results in

decrease in viscosity of liquid
decrease in viscosity of gas
increase in viscosity of gas
increase in viscosity of liquid

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

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