[lepton]

There is no formula, that I have ever been aware of that describes and can predict the efficiency of the flow,

No?

It's related to surface area...which is related to gauge.

At a glance, I'd say that for copper the function of ohms per thousand feet is something like subtracting 10 from the gauge, dividing that by 10, and taking the antilog of the result. That seems to get you pretty close.

[Cold Heat]

You are sorta making my point, and confirming what I was taught years ago on this subject....

As of now, we have a free electron theory, a radial movement theory, and my own chaos theory, and that is just three people.

This is what they instructor told me some twenty five years ago, that there was not agreement.

But, that was not the subject of the thread, and I digress. I made a mistake and pointed out that we don't know what we don't know, and apparently I have learned that we actually don't even know that we don't know.:-)

Have a nice day......