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
full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
supersonics, as with projectile and jet propulsion

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Hydraulics and Fluid Mechanics in ME
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

Glass tube is cheaper than a metallic tube
It is easier to see through the glass tube
It is not possible to conduct this experiment with any other tube
All of these

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Hydraulics and Fluid Mechanics in ME
In open channels, the specific energy is the

Kinetic energy plotted above the free surface of water
Total energy per unit discharge
Total energy measured above the horizontal datum
Total energy measured with respect to the datum passing through the bottom of the channel

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