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Answer to Question #65693 in Mechanics | Relativity for Afake Michael

Question #65693
Very high in the earth's atmosphere, the temperature can be as high as 700 degrees Celsius, yet an animal there would freeze to death rather than roast. EXPLAIN
Expert's answer
Yes, the temperature can be very high in the upper atmosphere but the density of the air (gas) is very low. That’s why the number of collisions of hot air molecules with animal is very low to roast the animal. Also the skin of animal would radiate heat to atmosphere. The emissivity of animal is greater than of atmosphere. Thus, the radiation heat loss of animal is much greater than energy from the radiation of atmosphere. So, animal will freeze to death.

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Comments

Nehal Patel
30.09.17, 22:48

if density is low , then molecules require for radiation of heat will also be less. so it can't make any difference to body temperature

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