Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

Directly proportional to N
Inversely proportional to N²
Directly proportional to N²
Inversely proportional to N

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Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

the center of buoyancy and the center of gravity must lie on the same vertical line
all the above are correct
a righting couple should be formed
the meta-center should lie above the center of gravity

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