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.
On the other hand, the size of the crew on a boat depends on the size of the boat. It can be one person or a full-fledged crew depending on the size and purpose of the boat. 5. Cargo Capacity. A boat is a small to mid-sized vessel, which has much lesser cargo carrying capability as compared to a ship.