Hydraulics and Fluid Mechanics in ME
Capillary action is due to the

All of the listed here
Surface tension
Adhesion of the liquid molecules and the molecules on the surface of a solid
Cohesion of the liquid

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Hydraulics and Fluid Mechanics in ME
Mach number is significant in

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

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