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Wet clothes dry faster in strong wind. What is the most appropriate humidity-related reason?

Answer and explanation

Correct answer: Wind removes the moist layer near the surface and increases evaporation.

Direct answer: A is correct. Evaporation is the change of liquid water into water vapour. A thin layer of moist air lies next to wet cloth. When the air in this layer becomes humid, evaporation slows because it can accept less additional vapour. Strong wind replaces this moist layer with comparatively drier air and carries the vapour away. Therefore, more water molecules can escape from the cloth each moment, so drying becomes faster. Wind does not need to freeze the water or destroy particles. A is correct because it describes removal of the humid boundary layer and faster evaporation. B is wrong because ordinary wind does not immediately freeze water. C is wrong because wind does not always produce 100 percent relative humidity; it often reduces moisture near the cloth. D is wrong because condensation nuclei are related mainly to droplet formation, not the main reason clothes dry. Memory cue: moving air removes moisture; it does not remove water by magic.

Related tags

Wind SpeedEvaporationHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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