Density
Density is a characteristic property of a substance. The density of a substance is the relationship between the mass of the substance and how much space it takes up (volume). In other words density is a measure of how heavy an object is relative to its size.
ρ = m/V
ρ = density, kg/m3, or g/(cm)3
m = mass, in kg or g
V = volume, in m3 or (cm)3
