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From: tim@ism780c.UUCP (Tim Smith)
Newsgroups: net.physics
Subject: Re: electrons
Message-ID: <339@ism780c.UUCP>
Date: Tue, 28-Jan-86 15:33:49 EST
Article-I.D.: ism780c.339
Posted: Tue Jan 28 15:33:49 1986
Date-Received: Thu, 30-Jan-86 06:46:47 EST
References: <1165@homxb.UUCP> <557@well.UUCP>
Reply-To: tim@ism780c.UUCP (Tim Smith)
Organization: Interactive Systems Corp., Santa Monica, CA
Lines: 9

>	Last, multiply by the atomic number of copper, to give the number
>of protons in the sphere in question.  Assuming no net charge, this
>will also be the number of electrons in the sphere.
>
If the sphere is negatively charged, you still get the right answer,
because copper is a conducter, so the extra electrons end up on the
surface instead of _in_ the sphere.
-- 
Tim Smith       sdcrdcf!ism780c!tim || ima!ism780!tim || ihnp4!cithep!tim