Re: [Phys-l] two kinds of electrical charge ????????

[Jack Uretsky <jlu@hep.anl.gov>]

Hi all-
	My problem with JD's fluid analogy is that it ain't analagous 
enough.
	JD may be clever enough to formulate a scheme where chunks of hot 
water appear as ``sources'' in a coulomb-like formula, but that's not 
enough.
	1. Charge us quantized in units  (1/3 units) of e, the charge on 
the electron.
	2.  There is a useable theory with color-charges that come in 
threes (3-fluid analogy?).
	3. Item 1 lets us formulate the prenmmt-day mystery, how come the 
units of hadronic charge are indistinguishable from the units of electron 
charge (why don't Newton's laws distinguish forces from people from 
forces from gravity?)
         4.  James' joke is relevant and Feynmanesque.  See the chapter on 
forces in the regular (not the advanced) edition of the Mechanical 
Universe (Feynman's lectures for kindergartners); electrical, magnetic, 
and gravitational forces can all be express in the form (capitals are 
vectors)
	F= constantxq1*q2*R/|R|^3,
so that in the gravitational case the effective charges are the masses.



On Tue, 31 Jul 2007, James McLean wrote:

> Hmm, if there is only one type of charge, how many types of mass are
> there?  One-half of a type?
>
> (Not even sure if that rises above the level of a joke. :-)
>
> -- James McLean
>
> John Denker wrote:
> > Hi --
> >
> > Recently I was asked about the following statement:
> >   «There are two kinds of charge, namely positive charge and negative charge.»
> >
> > That expresses the /two-fluid/ model of electrical charge.
> >
> > 1) Would anybody care to comment on this, perhaps contrasting it with the
> > one-fluid model?
> >
> > This seems fundamental to any physics course ... yet there seems to be
> > more divergence of opinion than I would have expected.
> >
> >
> > 2) As you might have guessed, I have an opinion:
> >   http://www.av8n.com/physics/one-kind-of-charge.htm
> > Suggestions or comments on my analysis are welcome.
> >
> > I suspect there are arguments and counterarguments I have missed, although
> > most discussions I've seen fall into the category of PbBA (Proof by Bold
> > Assertion) which I don't find helpful.
> >
> >
> > 3) I'd be interested to hear briefly:  What text are you using, and how
> > does it handle this issue?
> >
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