Published on August 24, 2014
Also known as upthrust Apparent weight Real (actual) weight or F = V g Weight of fluid dis laced A same boat sailing in the sea water and the river What is the purpose of Plimsoll line mark on a ship? The density of sea water varies with location. It is to ensure that a ship is loaded within safe limits, the Plimsoll line marked on the body of the ship acts as a guide. A ship will be submerged deeper in fresh water because the density of fresh water is less than the sea water. For this reason, a ship must displace more water to obtain sufficient buoyant force to support its weight. Moreover, a ship can float lower in the cold season as cold water has a higher density. The hydrometer floats higher in a liquid of higher density.