What’s the difference between density, specific density and true density?
Density or mass density (ρ) is the ratio between mass (m) and volume (V) of a sample which is expressed in the formula: ρ=m/V.
The most common units are kg/cm³ or g/cm³, whereas 1000k kg/m³ equal one g/cm³. The volume of a sample is depending on its temperature. Hence, the density is also highly depending on the temperature. Therefore, a precise measurement or regulation of the sample temperature is the key for precise results.
Besides the mass density we encounter the relative or specific density as well as the true or apparent density.