Hydraulics and Fluid Mechanics in ME
Venturimeter is used to

Measure the pressure difference of liquid flowing between two points in a pipe line
Measure the discharge of liquid flowing in a pipe
Measure the velocity of a flowing liquid
Measure the pressure of a flowing liquid

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Hydraulics and Fluid Mechanics in ME
Froude number is significant in

All of the listed here
Simultaneous motion through two fluids where there is a surface of discontinuity, 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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