Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

Running full
Running free
Partially running full
Partially running free

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Hydraulics and Fluid Mechanics in ME
Surface tension

Acts in the plane of the interface normal to any line in the surface
Is also known as capillarity
Decreases with fall in temperature
Is a function of the curvature of the interface

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