a random class question (engineering)

[mark-ER]

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What's up

I signed up for this electrical engineering-type course (I don't know why since I'm a bio major)... Anyway, one of the questions I'm dealing with asks how molecular mobility affects resistivity of a solution. The book doesn't mention this anywhere (ie no plug-chug formulas) and I don't remember it from class either. Any of you engineering or chem types point me in the right direction (any formulas I can use or a website)? Tx

 

[chula505]

if you look in a fluid mechanics book that may help. pm me if you need more help. It's been a while since i've done engineering but I may have some advice for resources to look at.

 

[crazy_cavalier]

www.google.com

 

[75969]

Resistivity is the the opposite of conductance (it is the tendancy of a substance to oppose electron flow through it). So, I assume that the less mobile the higher the resistivity???

 

[StevenRF]

So I think you mean electrical resistivity as opposed to fluid flow? To my knowledge it's just VC = I where V is the potential across a membrane or a channel or some thing. C is the conductance, how easily stuff flows through, and I is the current. It doesn't necessarily have to be just electrons, any charged particle will suffice.

If you need more background, search for the hodgkin huxley model for neurons on google. All the basic modeling sites will go into what your looking for.

 

[ubuggin]

might have something to do with how ionically charged the solution is

 

[2Xtrouble2X]

Resistivity is the the opposite of conductance (it is the tendancy of a substance to oppose electron flow through it). So, I assume that the less mobile the higher the resistivity???

potentially higher resistivity with less mobility