Chapter 12 Fundamentals

12.1 Density and pressure

12.1.1 Density and relative density

The mass density of a body is defined as the mass per unit volume of the body. Thus density is a standard measure of the mass of a substance that is contained in a volume of one metre cubed (1 m3). Combining the SI units for mass and volume gives the unit of density as kg/m3 and, in symbols:

The amount of a fluid contained in a cubic metre will vary with temperature, although the expansion of liquids with rising temperature is insignificant when compared to ...

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