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absolute humidity

Definition

Density of moisture (water vapor) per unit volume of air, expressed usually as kilogram per cubic meter (kg/m3). In comparison, relative humidity is the ratio (expressed as a percentage) of the water vapor in the air at a certain temperature and pressure to the maximum water vapor it can contain at the same temperature and pressure; and specific humidity is the ratio of water vapor in the air to the total mass of the air and water vapor.


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