[NewCandle] Aluminum and Copper Disc Weight Effects

[Frederick Sparber]

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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