In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place. Fluid mechanics is the study of how Fluids move and the Forces on them FLUID ( F ast L ight '''U'''ser '''I'''nterface D esigner is a graphical editor that is used to produce FLTK Source code The volume of the fluid displaced can then be measured, as in the illustration, and from this the volume of the immersed object can be deduced (the volume of the immersed object will be equal to the volume of the displaced fluid).

An object that sinks displaces an amount of fluid equal to the object's volume. The volume of any solid plasma vacuum or theoretical object is how much three- Dimensional space it occupies often quantified numerically Thus buoyancy is expressed by Archimedes' Principle which states that when this happens, the weight of the object is reduced by its volume times the density of the fluid. In Physics, buoyancy ( BrE IPA: /ˈbɔɪənsi/ is the upward Force on an object produced by the surrounding liquid or gas in which it is Archimedes of Syracuse ( Greek:) ( c. 287 BC – c 212 BC was a Greek mathematician, Physicist, Engineer In the Physical sciences weight is a Measurement of the gravitational Force acting on an object The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different If the weight of the object is less than this quantity, it will float, if more it will sink. The amount of fluid displaced is directly related (via Archimedes' Principle) to its weight.

In the case of an object which sinks the amount of fluid displaced will be equal in volume to the immersed object, whereas in the case of an object which floats the amount of fluid displaced will be equal in weight to the displacing object.