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: An [[object]] with a large amount of [[mass]] in a small [[volume]] is said to have a high [[density]].
: An [[object]] with a small amount of [[mass]] spread over a large [[volume]] is said to have a low [[density]].
: The [[SI Unit|units]] of [[density]] are kg/m<sup>3</sup>.
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===Equation===: Density = Mass/volume:<math>\rho = \tfrac{m}{V}</math>Where:ρ = densitym = massV = volume
===Density and Floating===
: If an [[object]] is more '''dense''' than [[water]] it will sink.
: If an [[object]] is less '''dense''' than [[water]] it will rise through [[water]] and float on the surface.