Sid_Rat

I think I sort of get the idea. How about this then ........is there any evidence of a relationship between relative velovity and temperature?

Is there a relationship between inertial mass, rest mass and temperature? If a body's inertial mass and rest mass are the same then presumably its temperature is exactly zero degrees Kelvin (hypothetically of course). Might it then be possible to deduce the temperature of a body if you already knew the values both for rest and inertial mass ?