Hydraulics and Fluid Mechanics in ME
A body floats in stable equilibrium

When its e.g. is below its center of buoyancy
When its meatcentric height is zero
When the metacentre is above e.g.
Metacentre has nothing to do with position of e.g. for determining stability

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Hydraulics and Fluid Mechanics in ME
The overall efficiency of a reaction turbine is the ratio of

Actual work available at the turbine to the energy imparted to the wheel
None of these
Work-done on the wheel to the energy (or head of water) actually supplied to the turbine
Power produced by the turbine to the energy actually supplied by the turbine

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