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electrons (in a conductor at common temperatures) is
the very high ratio between the rms velocity and the
drifting velocity. "
Ludwik Kowalski wrote:
One of the peculiarity of the drifting process of
electrons (in a conductor at common temperatures) is
the very high ratio between the rms velocity and the
drifting velocity. The flow of water through a porous
medium is a very different kind of "nearly random"
walk.
It's true that they're different. But I'm not sure I'd
say "very different". The same equations have the same
solutions.
Bernard Cleyet wrote:
just like diffusion of perfume in air.
I wouldn't have said that.
The diffusion of perfume through air is not similar
to either of the phenomena Ludwik mentioned.