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If relative humidity (RH) rises from 40% to 80% while temperature stays the same, what does this mean?

Answer and explanation

Correct answer: Actual vapour pressure has moved closer to saturation vapour pressure

The correct answer is A. Relative humidity is the actual vapour pressure divided by the saturation vapour pressure at the same temperature, multiplied by 100. Since the temperature is unchanged, the saturation vapour pressure is essentially unchanged. An increase from 40% to 80% therefore means that actual vapour pressure is a larger fraction of the saturation value and is closer to it.

Related tags

Relative HumidityVapour PressureConstant TemperatureHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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