Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

the nature of the liquid and the solid
the material which exists above the free surface of the liquid
both of die above
any one of the above

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Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Pressure head - (kinetic head + potential head)
Potential head - (pressure head + kinetic head)
Kinetic head - (pressure head + potential head)
Pressure head + kinetic head + potential head

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