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

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Hydraulics and Fluid Mechanics in ME
When an ideal fluid flows past a sphere

highest intensity of pressure occurs around the circumference at right angles to flow
lowest pressure intensity occurs at rear stagnation point
lowest pressure intensity occurs at front stagnation point
total drag is zero

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