See Also: Archimedes, Archimedes' Screw
Principle that states that a body immersed in a fluid is buoyed up by a Force equal to the Weight of the displaced fluid. In other words, an object is buoyed by the Water it displaces. The principle applies to both floating and submerged bodies,
and to all fluids. It explains not only the buoyancy of ships but also the rise
of a Helium-filled balloon and the apparent loss of weight of objects under water.