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What does relative humidity of 100% mean?

Answer and explanation

Correct answer: Air is saturated

Answer: A, the air is saturated. Relative humidity compares the actual amount of water vapour in air with the maximum amount the air can hold at the same temperature, expressed as a percentage. A value of 100% means the actual vapour content has reached that temperature-dependent capacity. It does not necessarily mean that the air contains the same absolute amount of moisture as air at another temperature. Cooling or adding more vapour may then lead to condensation, although rainfall is not guaranteed. B is the opposite of saturation. C is wrong because relative humidity does not tell us that rain has stopped. D is wrong because 100% relative humidity can occur at many temperatures. Memory cue: 100% means full capacity, not zero moisture or zero temperature.

Related tags

GeographyRelative HumiditySaturationHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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