All Questions
Tagged with mean-free-path homework-and-exercises
6
questions
1
vote
0
answers
115
views
Ratio of mean free paths between two equal volumes at different temperature, separated by a partition with pinhole
Question:
A container is divided into two equal parts I and II by a partition with a small hole of diameter $d$. The two partitions are filled with same ideal gas, but held at temperatures $T_I$= ...
- 1,022
1
vote
1
answer
91
views
Two versions of Diffusion coefficient
I found two versions of the Diffusion coefficient, first:
$$D=\frac{\pi \lambda }{8}\overline{c}$$
Where $ \overline{c}$ ist the particles mean thermal velocity and $\lambda$ the particles mean free ...
4
votes
1
answer
391
views
Derivation of relativistic mean free path
I am working through a short derivation found in Abramowicz 1991 regarding the mean free path of a photon.
We have a fluid moving in a particular direction with velocity $v$ and in an inertial rest ...
- 75
4
votes
2
answers
7k
views
RMS Free Path vs Mean Free Path
I am trying to determine the mathematical difference between mean free path and root-mean-square free path. For an ideal gas, the relaxation time is $$\tau=\frac{1}{\sqrt2 \pi nd^2 \bar v}$$ and the ...
- 1,158
0
votes
2
answers
1k
views
Molecular mean free path probability
Let's let $p(\xi)$ be the probability a molecule travels at least $\xi$ between collisions, lets say $\xi=0.01$. When I think of this statement, I think it it is the probability the molecule is able ...
- 1,158
1
vote
2
answers
1k
views
Energy of particle in electric field
I'm taking a physics class and the professor teaches us really basic things in lecture and then gives homework way beyond what he taught in lecture. Obviously I need to find some resource other than ...
- 236