Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

dependent only on Reynolds number
a function of Reynolds number and relative roughness
constant
dependent on relative roughness only

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

Gravitational force is less than the up-thrust of the liquid
Gravitational force is more than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid
None of these

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