Mass per unit volume is constantly present in the equations of fluid mechanics.

the Mass per unit volume unit is Kg/m3

The density of a liquid is the ratio of the mass per unit volume of the material on the water mass per unit volume. (for a gas, the ratio will be taken with the mass per unit volume of the air) This gives us a dimensionless number, without unity, which is the density of the material

Exemple: the water mass per unit volume is 1000 Kg/m3

the mass per unit volume of the oil is 800 Kg/m3

the density of the oil is=800/1000= 0.8

Density of water=1000/1000= 1

With julianum.net standard

The mass per unit volume of the liquid or gas is provided in the fluid editor: The editor gives the density of the fluid selected depending on the temperature but also its viscosity and saturation vapor pressure.

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Lists of liquids whose mass per unit volume is given in the editor fluids julianum.net: List of gas whose mass per unit volume is given in the editor fluids julianum.net: websites julianum.net & Heliciel
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