![]() ![]() Ρ substance = density of the fluid or substance Specific Gravity (Relative Density) - SG - is a dimensionless unit defined as the ratio of the density of a substance to the density of water - at a specified temperature and can be expressed as How to measure density of liquid petroleum productsĮxample 2: Using Density to Identify a MaterialĮxample 3: Density to Calculate Volume Mass Water - Density, Specific Weight and Thermal Expantion Coefficient - variation with temperature at 1, 68 and 680 atm, SI and Imperial unitsĪir - Density, Specific Weight and Thermal Expantion Coefficient - variation with temperature and pressure, SI and Imperial units Se also: Densities for some common materials Density is a physical property - constant at a given temperature and pressure - and may be helpful for identification of substances.īelow on this page: Specific gravity (relative density), Specific gravity for gases, Specific weight, Calculation examples On atomic level - particles are packed tighter inside a substance with higher density. See also Unit converter - mass and Unit converter - density Slugs can be multiplied with 32.2 for a rough value in pound-mass (lb m). Note that there is a difference between pound-force (lb f) and pound-mass (lb m). The Imperial (U.S.) units for density are slugs/ft 3 but pound-mass per cubic foot - lb m/ft 3 - is often used. What is weight and what is mass? - the difference between weight and mass.Mass is a property and the SI unit for density is. ![]() Density is defined as mass per unit volume. ![]()
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