Hydraulics and Fluid Mechanics in ME
The buoyancy depends upon the

Pressure with which the liquid is displaced
Compressibility of the liquid
Viscosity of the liquid
Weight of the liquid displaced

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Hydraulics and Fluid Mechanics in ME
The function of guide vanes in a reaction turbine is to

All of the listed here
Allow the water to enter the runner without shock
Allow the water to flow over them, without forming eddies
Allow the required quantity of water to enter the turbine

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