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.
This shape allows it to displace enough water to float. Another way to think about this is that the ship is less dense than a block of steel because it has air inside! Steel block; higher density; sinks. AirSteel ship; lower density (same mass, more volume); floats.