I am reading a book of thermodynamics. I have some problems and I hope you can help. But I am not sure whether these are math problems or physics problems. I am sorry if I post in a wrong place.(adsbygoogle = window.adsbygoogle || []).push({});

page 1

Please read (10.19), the definiton of [tex]W(r)[/tex]

The writer defined [tex]W(r)[/tex] as "probability that particle will travel a distance r without suffering a collision". Does this definition make sense? since distance should be regarded as continuous variable. Why isn't defined as "... a distance [tex]r + dr[/tex]..."?

Furthermore, since [tex]W(r)[/tex] is probability, we must have

[tex]

\int_{0}^{\infty} W(r) dr = 1

[/tex]

Page 2

How come (10.27) is true? How can A be 1?

Thanks in advance!

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# Thermodynamics problem

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