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Encyclopedia > Humid

Humidity is the quantity of moisture in the air. It can be expressed as absolute humidity, which is the mass of water in a specific mass of air, or more commonly as relative humidity, which is the ratio of absolute humidity divided by that absolute humidity that would make dew form at the same temperature.

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  Results from FactBites:
Humidity - Wikipedia, the free encyclopedia (1369 words)
Humidity is the concentration of water vapor in the air.
Absolute humidity is a method of expressing the amount of water vapor by using the ratio of the mass of the water vapor to the volume of the air.
Specific humidity or the mixing ratio is a method of expressing the amount of aqueous vapor in air by using a ratio of water vapor to dry air.
Relative humidity - definition of Relative humidity in Encyclopedia (654 words)
Relative humidity is the ratio of the current vapor pressure of water in any gas (especially air) to the vapor pressure at which the gas would become saturated at the current temperature, normally expressed as a percentage.
This phenomemon is the mechanism behind thunderstorms, since as the humid rising air also becomes colder as it rises due to adiabatic cooling, and as the air cools past its dew point, water condenses as rain.
Relative humidity is often mentioned in weather forecasts and reports, as it is an indicator of the likelihood of precipitation, dew, or fog.
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