Q:

Which choice explains how the evaporation of sweat “cools” our body?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:20| Question number:55

waelhammad

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2022-10-22

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Which choice explains how the evaporation of sweat “cools” our body?

Evaporating water molecules carry with them more than the average amount of kinetic energy which leaves the remaining molecules with a lower average kinetic energy.
The body loses more heat through the infrared radiation emitted by sweat than it gains from the infrared radiation emitted by the surroundings.
Sweat is at a lower temperature than our core body temperature so sweat on our skin cools us by conduction.
The water molecules in sweat are at a higher temperature than our core body temperature so losing sweat leaves us cooler due to the mass of water lost.

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waelhammad

2022-10-22

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A: Water molecules have a range of KE. The water molecules with the most KE are those that vaporise fi rst. Sweat will be at the same temperature as the skin it sits on.

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