Hydraulics and Fluid Mechanics in ME
Mach number is significant in

all of fhe above
supersonics, as with projectiles and jet propulsion
full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls

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Hydraulics and Fluid Mechanics in ME
The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

(IG/Ax̅) - x̅
(Ax̅/IG) + x̅
(IG/Ax̅) + x̅
(IG/x̅) - Ax̅

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will float if

None of these
Gravitational force is more than the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid

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