Re: A question for those interested in physics...
From Timberwoof <tim...@infernosoft.com>
· alt.ascii-art
· 28 Mar 2002 22:15 · View full thread
· report
In article <3CA...@greyREMOVErock.org>, Elizabeth <boo...@greyREMOVErock.org> wrote: > It was sort of a joke question. I haven't studied physics for a while, > but IIRC, it doesn't make a sound. I guess we're talking about a closed > system, so the energy required to ring the bell must come from within, > and barring no other forces involved, the bell would vibrate > indefinitely. Now I wonder if there's a small amount of heat involved in > the transfer of energy. Anybody know? I haven't thought about this stuff > in ages! The bell rings because someone hit it with something. Its ringing sets up pressure waves in the air, and we can hear those. In a vacuum, a bell might vibrate for longer than in an atmosphere because there's no atmosphere to carry energy away from it. However, internal friction of the moving metal will eventually damp the vibrations (and heat up the bell). Imagine this scenario: Rigidly attach a bell to the inside of a steel container. Evacuate the air from the container. Then ring the bell. (Okay, you can have an electromagnet with a hammer in there.) Assuming that you and the container are in an atmosphere, and the container isn't unreasonably thick, you might be able to hear the bell ringing even though it's in a vacuum. -- Timberwoof <timberwoof at infernosoft dot com> http://www.infernosoft.com/timberwoof/motorcycle/index.html a motorcycle faq: http://www.infernosoft.com/timberwoof/motorcycle/faq.shtml
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From: Timberwoof <tim...@infernosoft.com>
Newsgroups: alt.ascii-art,alt.seduction.fast,comp.os.linux.advocacy,comp.text.tex,alt.flame.jesus.christ,comp.sys.mac.advocacy,comp.unix.bsd.openbsd.misc,comp.unix.bsd.freebsd.misc,comp.unix.bsd.misc,sci.physics
Subject: Re: A question for those interested in physics...
Organization: Infernosoft
References: <x7Vn8.1094$sO2...@news.xtra.co.nz> <a7r0ti$tlr$1...@jair.pressenter.com> <3CA18BA6.1C0@_REMOVETHIS_erols.com> <3CA...@csse.monash.edu.au> <3CA1966B.605@_REMOVETHIS_erols.com> <3CA...@csse.monash.edu.au> <3CA...@greyREMOVErock.org> <Zdqo8.232379$s43...@typhoon.columbus.rr.com> <3CA...@greyREMOVErock.org>
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