## Statistical Physics, Volume 5Elementary college physics course for students majoring in science and engineering. |

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Page 43

The ratio of the mass m of an atom (or

atomic weight of the atom (or

denoted by p. Thus 1n P = 7. (23) The atomic weight of 12C is thus, by definition,

...

The ratio of the mass m of an atom (or

**molecule**) to the mass unit mo is called theatomic weight of the atom (or

**molecular**weight of the**molecule**) and will bedenoted by p. Thus 1n P = 7. (23) The atomic weight of 12C is thus, by definition,

...

Page 47

All the

fraction of the

small hole in the container, some of the

All the

**molecules**of the gas do not have the same speed and we can ask whatfraction of the

**molecules**have a speed in any specified range. If we make a verysmall hole in the container, some of the

**molecules**will escape through the hole ...Page 321

the cross section o is, in general, also a function of the relative speed V of the

relations (2) or (3) are still useful (although the concept of a

not well ...

the cross section o is, in general, also a function of the relative speed V of the

**molecules**. For purposes of making approximate estimates, however, therelations (2) or (3) are still useful (although the concept of a

**molecular**radius isnot well ...

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### Contents

Characteristic Features of Macroscopic Systems | 1 |

A I | 2 |

I | 6 |

Copyright | |

26 other sections not shown

### Common terms and phrases

absolute temperature absorbed accessible approximation assume atoms average Avogadro's calculate classical collision Consider constant container corresponding cules denote discussion distribution ensemble entropy equal equilibrium situation equipartition theorem example exchange energy expression external parameters fluctuations function given heat capacity heat Q heat reservoir Hence ideal gas initial internal energy interval isolated system kinetic energy large number left half liquid ln Q macroscopic parameters macroscopic system macrostate magnetic field magnetic moment magnitude mass mean energy mean number mean pressure mean value measured mechanics mole molecular momentum number of molecules occur oscillator particle particular partition phase space piston position possible values Prob quantity quantum numbers quasi-static random relation result simply solid specific heat spin system statistical statistical ensemble statistically independent Suppose thermal contact thermal interaction thermally insulated thermometer tion total energy total magnetic total number unit volume velocity