Message-Id: <v01540b16af4231f6a9fa@[192.174.2.173]>
Date: Tue, 4 Mar 1997 12:09:48 -0800
To: pinhole@exploratorium.edu
From: pauld@exploratorium.edu (Paul Doherty)
Subject: Re: magnets and cloud chambers
>Date: Sun, 2 Mar 1997 02:35:14 -0500 (EST)
>From: Biedenweg@aol.com
>To: pauld@exploratorium.edu
>Subject: Re: magnets and cloud chambers
>
>Paul,
>I am planning on coming up to the Exploratorium. I'm just not sure when yet.
>I want to finish this lab on Electrostatics that I'm writing and then I just
>have two to go- both on AC circuits. I have a couple of questions: 1) why
>isn't an insulated piece of metal easy to charge by rubbing; 2) I'm trying to
>find two readily available materials that can be rubbed together where one
>will pick up enough negative charge and the other will pick up and hold
>enough positive charge to register this fact on a charged electroscope. So
>far my investigations only work with a Synchylla (sp) jacket by Patagonia
>when rubbed on a balloon. The Patagonia "cloth" holds enough charge to make
>the leaves spread apart after the leaves have been charged by the balloon. In
>my investigations this has been a real rarity. The cloth (whatever it happens
>to be made of silk, wool, flannel) never aquires and holds enough charge to
>spread the leaves more. Any suggestions? Thanks. Doug
>