The overall efficiency of a centrifugal pump is simply the ratio of the water (output). power to the shaft (input) power and is illustrated by the equation below. Î· = P W / P S where Î· is efficiency, P w is the water power, and P s is the shaft power.
While talking about difference between a ship and a boat, the first thing that comes to oneâs mind is their sizes. Traditionally people consider a ship as a large ocean going vessel, whereas boats are comparatively quite smaller in size.
One answer is that a ship can carry a boat, but a boat cannot carry a ship. Another is that a ship's captain gets annoyed if you refer to his vessel as a boat, but a boat's captain does not get annoyed if you refer to his vessel as a ship.