Hydraulics and Fluid Mechanics in ME
Slip of a reciprocating pump is negative, when

Delivery pipe is long and pump is running at high speeds
Suction pipe is short and pump is running at low speeds
Suction pipe is long and delivery pipe is short and the pump is running at high speeds
Suction pipe is short and delivery pipe is long and the pump is running at low speeds

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

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

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