[NewCandle] Aluminum and Copper Disc Weight Effects

[Nick Reiter]

Good morning, Fred and all,

Do you have the original spec sheet for your balance? 
If so, it might pay to confirm whether there is a
minimum recommended reading resolution to it.  You
mention that it has a 1 gram resolution, but I infer
that is the display.

Reason I ask is that the weight deltas you are getting
are at about 1 gram in this experiment.  In the past,
as much as I wince to do so, I generally have to
disregard anything at or below the recommended reading
resolution of the balance, exception being with my
analog lab balance, but even then, anything below the
1mg scale is extremely speculative.

You may also want to consider the effect of your hand
transfering charges to copper and aluminum.  Back in
2001 or so, I thought I had a weight anisotropy effect
where a specially coated glass plate I made looked
like it weighed a couple milligrams more with coating
up than with coating down.  Yay for gravitational
anisotropies!  Unfortunately..... Eventually, I found
that it had to do with the vinyl gloves I used to keep
everything pristine!  Just touching the glass sample
with a gloved hand made for an electrophoretic effect.
 When I went to rubber gloves, the effect vanished.

But all that aside, where are you performing your
experiment at?  Inside a home or lab room; or
outdoors?  Wouldn't you expect a much greater (less
attenuated) effect outside than in?  Oleg Jefimenko
used to have to find sweet spots outdoors to run his
corona motors off of the earth field, as buildings,
grounded flagpoles, wind direction, and even parked
vehicles would distort the field profile and gradient.

N

--- Frederick Sparber <fsparber at gmail.com> wrote:

> Ponderings:
> 
> There are 3.548E24 atoms in the 377 gram copper disc
> and
> exactly twice that many (7.117E24) atoms in the 319
> gram aluminum disc
> 
> If the aluminum donates 3.548E24 electrons to the
> copper upon contact
> the donated charge is 3.54E24  * 1.6E-19 Coulombs =
> 5.677E5 Coulombs
> which is 1/2 the excess negative charge on the
> earth.  :-)
> 
> Fred
> 
> 
> On 8/16/07, Frederick Sparber <fsparber at gmail.com>
> wrote:
> >
> > The 3 inch diameter x 1 inch thick 319 gram
> (consistent) Aluminum disc and
> > the 2.5 inch diameter x 1/2 inch thick 376 and 377
> gram (depending) Copper
> > disc from McMaster-Carr were weighed on the 10 kg
> 1.0 gram resolution
> > Acculab digital scale combined (stacked) and
> separately
> >
> > The stacked weight would vary between 695 and 696
> grams depending
> > on removing and flipping the stack or copper disc
> over.
> >
> > The lower work function Aluminum is supposed to
> charge positive
> > upon separation from the higher work function
> copper when they
> > are separated from contact.
> >
> > Fred
> >
> >
> >
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>
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> 



       
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