Definition:Density (Physics)

Definition
Density is a physical quantity.

The density of a body is its mass per unit volume.

For a homogeneous body it is found by finding its total mass and dividing it by its total volume:
 * $\rho = \dfrac m V$

where:
 * $m$ is the body's mass
 * $V$ is the body's volume

However, if the substance of the body varies throughout, then its density may be a function of position within the body.

Also see

 * Definition:Dirichlet Density