Re: Machining an Egg

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Mddeming@xxxxxxx 


Hi Adam, All,

    You're right, butI think we may be getting into a semantic quagmire.
Solid<==>Pure, Solid <==> Not Hollow, Solid <==>Not Plated
Solid copper is not pure copper. A pure copper penny would bend too 
easily and thus make a miserable emergency screw driver. ;^)
Solid chocolate candy is not hollow
Solid gold means not plated, but may be  only 10k~12k
Even pure silver coins still had 0.1% other stuff
The change in penny alloy does explain why the penny-nickel-blotting 
paper-lemon juice battery demonstration doesn't work as well for the 
grandkids as it did for me back when, and why some types of vending 
machines gag on new pennies. (weight sensitive)
Matt D

In a message dated 9/18/06 2:46:31 P.M. Eastern Daylight Time, 
tesla@xxxxxxxxxx writes:
Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

Though close, pennies have never been "solid copper".

http://en.wikipedia.org/wiki/Penny

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
>
> afaik pre-1981 pennies are solid copper. I actually
> save em every
> time I get change to make ingots (or maybe eggs lol)
> when the price
> rises enough (or the energy cost falls enough) to
> actually make it
> worth the effort. Pure copper is not easy to melt
> w/o oxidizing it by
> the common Joe with a newfound use for the bbq after
> using it for
> melting nst tar.