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

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

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be non-uniform when

The quantity of liquid flowing per second is constant
The liquid particles at different sections have different velocities
The liquid particles at all sections have the same velocities
Each liquid particle has a definite path

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