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- From: sichase@csa3.lbl.gov (SCOTT I CHASE)
- Newsgroups: sci.physics
- Subject: Re: Materials for simple static electricity expts.
- Message-ID: <23DEC199213171371@csa3.lbl.gov>
- Date: 23 Dec 92 21:17:00 GMT
- References: <1992Dec15.210441.28006@ncar.ucar.edu> <Dec.16.20.40.12.1992.9610@ruhets.rutgers.edu>
- Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
- Lines: 23
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-
- In article <Dec.16.20.40.12.1992.9610@ruhets.rutgers.edu>, bweiner@ruhets.rutgers.edu (Benjamin Weiner) writes...
- >When I ran an electrostatics lab session we obtained opposite charges by
- >rubbing:
- >1. plastic (bakelite?) rods with fur or possibly wool
- >2. glass rods with silk, or maybe even nylon.
- >
- >I don't think anyone's mentioned #2. I remember that it was always
- >a little harder to charge the glass rods. Of course it should
- >be done on a very dry day.
-
- You can produce a static charge, enough, say, to produce a clear separation
- of the gold foils of an electroscope, by rubbing or grinding most nonconductive
- materials. For example, you can charge your electroscope by grinding coffee
- onto the electrode. This will surprise your students. And you can recycle
- your demonstration into a nice hot cup of java. Peet's coffee works best.
-
- -Scott
- --------------------
- Scott I. Chase "It is not a simple life to be a single cell,
- SICHASE@CSA2.LBL.GOV although I have no right to say so, having
- been a single cell so long ago myself that I
- have no memory at all of that stage of my
- life." - Lewis Thomas
-