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Introductory Physics Homework Help
Very basic form of the diffusion law for gasses
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[QUOTE="Coffee_, post: 4966386, member: 411705"] [B] I'm looking for a proof of the following statement at a level an early undergrad would understand: ##J=D \vec{\nabla} \vec{n}## where ##D=\frac{v_{th}l}{3}## with ##l## being the mean free path and ##v_{th}## the thermal agitation velocity, ##J## is the particle current density. I really did try google a lot but no luck. Either the proof is way too complicated for me to understand or it just tells the results without work. I'm looking for a very raw/approximating derivation that doesn't really have to be formal at all, something that can be understood in like 10 minutes, hard assumptions are allowed. I would really appreciate it if someone who knows where I can find one, could inform me.[/B] [/QUOTE]
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Introductory Physics Homework Help
Very basic form of the diffusion law for gasses
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