So, we all know whether a train is moving depends on where the observer is. For passengers riding on it, the train is not moving. And high temperature are just particle moving with high speed. Is it possible that some observers will find a hot object cold? Just like the passengers on the train Thanks in advance!
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The formula that relates the kinetic energy of atoms and it’s temperature uses the mean square root of their velocities. Squaring and rooting them basically means you eliminate direction, so it’s an absolute value of all those velocities combined, and not to do with changing displacement, which is what makes velocity relative.
The formula: (3/2)kT = (1/2)m<c^2>
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