Hydraulics and Fluid Mechanics in ME
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

cannot be predicted from the given data
zero
one-half its value when cylinder was full
one-fourth its value when cylinder was full

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Hydraulics and Fluid Mechanics in ME
Froude number is significant in

Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls
Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
All of the listed here
Supersonics, as with projectile and jet propulsion

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