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

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Page 41

The magnitude of the

remain unchanged; i.e., the molecule, approaching the right wall with

mc in the +x direction, must have a

The magnitude of the

**momentum**of the molecule must then, on the average, alsoremain unchanged; i.e., the molecule, approaching the right wall with

**momentum**mc in the +x direction, must have a

**momentum**— mt in this direction after it ...Page 232

The state of the molecule is described classically in terms of the three position

coordinates x,y,z of the molecule and its corresponding three

components propy,p. We can then ask for the probability that the position of the

molecule ...

The state of the molecule is described classically in terms of the three position

coordinates x,y,z of the molecule and its corresponding three

**momentum**components propy,p. We can then ask for the probability that the position of the

molecule ...

Page 326

8.5

net

.}. Hence the force Per of (13) is given by Por = the mean increase, per unit time ...

8.5

**Momentum**transport by molecules crossing a plane. is merely equal to {thenet

**momentum**gain per unit time of the gas above the plane from the gas below it.}. Hence the force Per of (13) is given by Por = the mean increase, per unit time ...

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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