Question

In the upper part of atmosphere kinetic temperature of air is in order of 1000k though we feel very cold.why?

Answer 1

As we go up in the atmosphere , the number of molecules per unit volume decreases . The quantity of heat per unit volume or the heat density is low . But the translational kinetic energy per molecule is quite large. As the kinetic temperature is the measure of translational kinetic energy, so the kinetic temperature is quite high in the upper atmosphere but one feels severe cold due to low heat density.

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