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

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

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Hydraulics and Fluid Mechanics in ME
Reynolds number is significant in

All of these
simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
supersonics, as with projectile and jet propulsion
full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc

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