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J. Perelman
"Entertaining physics". Book 2.
Chapter 7. Thermal phenomena

THE HOT BREATH OF THE DESERT

"Then the wind and on a hot day should bring cool, " you say, perhaps, the reader, after reading the previous article. - Why, in that case, travelers say about the hot breath of the desert?"

The contradiction is explained by the fact that in tropical climates, the air is warmer than our body. No wonder there when the wind is not cooler and hotter. Heat will be transferred there from the body to the air, but back in the air heats up the human body. Therefore, the large mass of air time every minute to come in contact with the body, the stronger the feeling of heat. However, evaporation and here increases with the wind, but the first reason outweighs. That is why the inhabitants of the desert, such as Turkmen, wear warm robes and fur hats.

Entertaining physics J. Perelman

 




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