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Why does the human body feel more sultry when humidity is high?

Answer and explanation

Correct answer: Sweat does not evaporate easily

Correct answer: A. The body uses sweating as one way to lose heat, but sweating cools the body most effectively when the liquid sweat evaporates from the skin. High humidity means that the surrounding air already contains much water vapour, so it can accept less additional vapour. Evaporation becomes slow, sweat remains on the skin for longer, and the body loses heat less effectively. This produces a sticky, sultry feeling even if the air temperature has not changed. B is incorrect because high humidity does not make the skin hard. C is the opposite of reality: humid air contains considerable water vapour. D has no connection with the immediate cause of sultriness. Remember the distinction: humidity does not necessarily mean higher temperature; it reduces the efficiency of evaporative cooling.

Related tags

GeographyHumidityEvaporative-CoolingWeatherEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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