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.
I thought it was because the difference between ship and boat.. A boat is a small vessel that can be carried aboard a ship.. Like whale boats, patrol boats, skiffs, etc. Originally submarines were small craft that were carried by and launched from ships. Today's submarines however are too large and would never be carried by any ship. I was on a pier once, discussing this issue with a Navy officer, as we looked at the 560 ft long Trident submarine in front of us.