Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

the height of barometer will be less
it is the best liquid
its vapour pressure is so low that it may be neglected
both (B) and (C)

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Hydraulics & Fluid Mechanics
Metacentric height is given as the distance between

the center of gravity of the body andthe meta center
the center of gravity of the body and the center of pressure
the center of gravity of the body and the center of buoyancy
center of buoyancy and metacentre

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