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Atmospheric pollutant concentrations expressed as mass per unit volume of atmospheric air (e.g., mg/m 3, μg/m 3, etc.) at sea level will decrease with increasing altitude because the atmospheric pressure decreases with increasing altitude. The change of atmospheric pressure with altitude can be obtained from this equation: [2]
g/dm3: g/dm 3: 1: gram per cubic decimetre: grams per cubic decimetre: gram per cubic decimeter: grams per cubic decimeter: kg/m3: Density: g/L: g/L: 1: gram per litre: grams per litre: gram per liter: grams per liter: lb/cuin: Density: g/mL: g/mL: 1000: gram per millilitre: grams per millilitre: gram per milliliter: grams per milliliter: lb ...
The official SI symbols are g/cm 3, g·cm −3, or g cm −3. It is equivalent to the units gram per millilitre (g/mL) and kilogram per litre (kg/L). The density of water is about 1 g/cm 3, since the gram was originally defined as the mass of one cubic centimetre of water at its maximum density at 4 °C (39 °F). [1]
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The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...
Sometimes specific volume is expressed in terms of the number of cubic centimeters occupied by one gram of a substance. In this case, the unit is the centimeter cubed per gram (cm 3 /g or cm 3 ·g −1). To convert m 3 /kg to cm 3 /g, multiply by 1000; conversely, multiply by 0.001. Specific volume is inversely proportional to density.
Density system unit unit-code symbol or abbrev. notes sample default conversion combination output units Metric: kilogram per cubic metre: kg/m3 kg/m 3: 1.0 kg/m 3 (1.7 lb/cu yd)
0.1451397 g/cm 3 (He-II superfluid at 0 K, saturated vapor pressure) Hoffer et al. 0.17309 g/cm 3 (from 23.125 cm 3 /mole; He-II from hcp melt at 0 K, 25.00 atm)