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.
âBoats have propellers, something down in the water, and the drag slows down the boat when the motor is off. The hull creates water resistance and so motorboats stop much faster than jet skis. PWCs are very different than boats. There is nothing underneath the hull.