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Thermal Physics

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17 Jan 2012 18:55:32 IST

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is temperature frame dependent???

Physics

is temperature frame dependent???

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Sumiran agrawal

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17 Jan 2012 21:20:11 IST

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Suppose a box of idel mono-atomic gas has reference frame velocities V _xav , V_yavand V_zav , then at equilibrium the atoms of the ideal gas have three average velocities. Now define the rms velocities as

V _{x rms} = sqrt [ sum over all atoms(Vx - V xav)^2 ]/N and the following for y and z, where the sums are over N which is equal to billlions and billions of atoms. The thermal temperature of the gas is given by V x rms (for y,z too) and not V x av(for y,z also) and therefore has no direct connection to the reference frame velocity.

arna ghosh

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19 Jan 2012 00:05:30 IST

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so the temperature changes for different frame ...isn't it?????????

Sumiran agrawal

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19 Jan 2012 16:54:38 IST

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No, the temperature is the same. The temperature is based only on the random velocities.

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