Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Wetted perimeter and diameter of pipe
Velocity of flow and area of flow
None of these
Area of flow and wetted perimeter

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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

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

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