Hydraulics and Fluid Mechanics in ME
In an immersed body, center of pressure is

at the center of gravity
above the center of gravity
could be above or below e.g. depending on density of body and liquid
below be center of gravity

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Hydraulics and Fluid Mechanics in ME
Two dimensional flows occurs when

The direction and magnitude of the velocity at all points are identical
The velocity of successive fluid particles, at any point, is the same at successive periods of time
The magnitude and direction of the velocity do not change from point to point in the fluid
The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

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Hydraulics and Fluid Mechanics in ME
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

The metal piece will be immersed in mercury by half
The metal piece will simply float over the mercury
Whole of the metal piece will be immersed with its top surface just at mercury level
Metal piece will sink to the bottom

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