Density is characterized as mass every unit volume. Fixed is a property and the SI unit for thickness is <kg/m3>.
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Density deserve to be express as
ρ = m / V = 1 /ν <1>
whereρ = density
The imperial (U.S.) devices for thickness areslugs/ft3 but pound-mass per cubic foot - lbm/ft3 - is often used. Note that there is a difference between pound-force (lbf) and also pound-mass (lbm). Slugs have the right to be multiplied through 32.2 because that a stormy value in pound-mass (lbm).1 cheese = 32.174 lbm = 14.594 kg 1 kg = 2.2046 lbm = 6.8521x10-2 slugs density of water: 1000 kg/m3, 1.938 slugs/ft3
See also Unit converter - mass and Unit converter - density
On atomic level - particles room packed tighter inside a problem with greater density. Thickness is a physical property - consistent at a offered temperature and also pressure - and may be beneficial for identification of substances.
Below top top this page: particular gravity (relative density), particular gravity for gases, details weight, calculation examples
Se also: Densities because that some usual materials Water - Density, specific Weight and also Thermal Expantion Coefficient - variation v temperature in ~ 1, 68 and 680 atm, SI and also Imperial devices Air - Density, details Weight and also Thermal Expantion Coefficient - variation v temperature and pressure, SI and also Imperial units how to measure thickness of fluid petroleum products
Example 1: thickness of a Golf ball example 2: Using thickness to recognize a Material example 3: thickness to calculate Volume Mass
Specific gravity (Relative Density) - SG - is a dimensionless unit identified as the ratio the the thickness of a substance to the thickness of water - at a specified temperature and also can it is in expressed as
SG = ρsubstance / ρH2O <2>
whereSG = certain Gravity of the substanceρsubstance = density of the liquid or problem
It is typical to use the thickness of water in ~ 4 oC (39oF) as a reference because water in ~ this allude has its highest density of 1000 kg/m3 or 1.940slugs/ft3.
Since certain Gravity - SG - is dimensionless, it has actually the same value in the SI system and also the royal English mechanism (BG). SG of a liquid has the exact same numerical value as its density expressed in g/mL or Mg/m3. Water is normally likewise used as reference as soon as calculating the specific gravity because that solids.
See also Thermophysical nature of Water - Density, freezing temperature, cook temperature, Latent warm of melting, Latent warmth of evaporation, an essential temperature ...example 4: details Gravity of Iron details Gravity for some common Materials
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Specific gravity of gases is typically calculated with referral to wait - and defined together the proportion of the density of the gas to the thickness of the air - at a mentioned temperature and pressure.The certain Gravity can be calculated as
SG = ρgas / ρair <3>
whereSG= specific gravity that gasρgas= density of gas
Molecular weights deserve to be provided to calculate particular Gravity if the densities the the gas and the air space evaluated in ~ the very same pressure and also temperature.
See also Thermophysical properties of air - density, viscosity, critical temperature and also pressure, triple point, enthalpi and also entropi, thermal conductivity and diffusicity,......
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Specific Weight is characterized as weight per unit volume. Load is a force. The SI unit for details weight is
Specific load (or force per unit volume) deserve to be to express as
γ = ρ ag <4>
whereγ = certain weight (N/m3>,
Example 5: certain Weight the Waterparticular Weight because that Some typical Materials
|SAE 20 motor Oil||57||8.95|
|Stainless Steel||499 - 512||78 - 80|
|Wrought Iron||474 - 499||74 - 78|
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Example 1: density of a Golf ball
A golf ball has a diameter of 42 mm and a fixed of 45 g. The volume that the golf ball deserve to be calculate as
V = (4/3) π (42
The density of the golf ball deserve to then it is in calculated as
ρ = 45
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Example 2: Using density to recognize a Material
An unknown liquid substance has actually a mass of 18.5 g and also occupies a volume that 23.4 ml (milliliter).
The density of the substance deserve to be calculation as
ρ = (18.5
= 18.5 10-3
If we look increase the densities that some usual liquids we find that ethyl alcohol - or ethanol - has a thickness of 789 kg/m3. The liquid may be ethyl alcohol!
Example 3: thickness to calculate Volume Mass
The thickness of titanium is 4507 kg/m3. The massive of 0.17 m3 volume titanium have the right to be calculation as
m = 0.17
Note! - be conscious that there is a difference between "bulk density" and actual "solid or product density". This may not be clean in the summary of products. Always dual check worths with other sources before important calculations.
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Example 4: details Gravity of Iron
The thickness of steel is 7850 kg/m3. The particular gravity that iron related to water with density 1000 kg/m3 is
SG(iron) = 7850
Example 5: specific Weight that Water
The density of water is 1000 kg/m3 at 4 °C (39 °F).
The certain weight in SI devices is
γ = 1000
The thickness of water is 1.940 slugs/ft3 at 39 °F (4 °C).
The particular weight in royal units is
γ = 1.940
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