sci.physics.electromag

"Benj"
> Szczepan Bialek wrote:
>
>> We must use only one method. Charge or field.
>
> IF the two methods don't agree then one of them is just plain wrong!

Set than to students the next task:

You need the DC supply, earth and the two wires. In DC is the higher charge
(electrons) density. Connect DC to the earth using the two wires. Ask them
what is the charge density along the wires (charge method). Next you can
calculate it with field method. Will be the same result?
(Already I have proposed to calculate the force between them using the
charge method - do you remember "If you use the Coulomb's equation in the
version modified by Aepinus you should find that wires with the same
direction of gradQ attract."
.
>>
>> It has been measured ( to adjacent space) in the MM and MG experiments.
>
> No "it" (absolute velocity) has NOT been measured. If it's "to
> adjacent space" it's just relative velocity. You are having a lot of
> trouble with reference points! Without an absolute reference point
> you can never measure "absolute" velocity. If you just compare two
> items then it's relative. One "relative" to the other. Get it?

Yes. But "absolute" are different. It depends from "to". The Absolute
Velocity is the vector that describes the velocity relative to the origin of
the coordinate frame" For me is enough to set the origin on the Sun (If we
are measuring the absolute physical voltage of a metal rod driven into
soil)
S*