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Thermodynamics and Kinetics of a Brownian Motor

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Science  09 May 1997:
Vol. 276, Issue 5314, pp. 917-922
DOI: 10.1126/science.276.5314.917

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  • Two different temperatures

    Abstract: There are two different temperatures in physics, so we can’t know the change of the temperature in the relativity theory. We will discuss those two temperatures in this paper. (We only discuss the temperature of the objects in no gravitational field now)
    Keywords: temperature; relativity theory; radiation
    Two different temperatures
    1, Temperature in the thermal conduction
    Temperature in the thermal conduction shows the intensity of the random thermal motion of the particles in the object. We can use the kinetic energy of the particles to show the intensity of the random thermal motion.
    E=3/2kT
    We can measure this temperature by using the spirit thermometer. This temperature shows the really kinetic energy of the particles, we can use this temperature to judge the state of the objects, like does the water should become the ice in this condition. If there is an object A which is moving with velocity v, and there are many spirit thermometers (A1, A2, A3...) which are static in all points of this inertial frame, and we assume the measure doesn’t use time. We can get the temperature T0, if we put another spirit thermometer B on the object, we can get the temperature T1 by B , we think that T0=T1 because the intensity of the random thermal motion of the particles in the object only depend on the relative motion between the particles, and the relative motion between the particles is same in two different inertial frames. So if in an i...

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    Competing Interests: None declared.

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