Re: A question for those interested in physics...
"Timberwoof" wrote ... > 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. Nope. You'll hear the steel container resonating to the vibrations of the bell. (You /did/ say it was a rigid attachment?) -- arjay Denizen of Darkness #111 Damned by Dore #42 Ubi dubium ibi libertas. > -- > 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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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f9e16,53f9f7cceb4d817f X-Google-Attributes: gidf9e16,public X-Google-Thread: fc9f9,53f9f7cceb4d817f X-Google-Attributes: gidfc9f9,public X-Google-Thread: f996b,53f9f7cceb4d817f X-Google-Attributes: gidf996b,public X-Google-Thread: fcfb9,d0123b843bd8782d X-Google-Attributes: gidfcfb9,public X-Google-Thread: 107d75,4a81179a975b6945 X-Google-Attributes: gid107d75,public X-Google-Thread: f9391,53f9f7cceb4d817f X-Google-Attributes: gidf9391,public X-Google-Thread: 10cbb9,53f9f7cceb4d817f X-Google-Attributes: gid10cbb9,public X-Google-Thread: 10eb3b,53f9f7cceb4d817f X-Google-Attributes: gid10eb3b,public X-Google-ArrivalTime: 2002-03-28 16:23:20 PST From: "arjay" <arj...@sympatico.ca> 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 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> <tim...@typhoon.sonic.net> Subject: Re: A question for those interested in physics... Lines: 42 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: <UpOo8.9545$n82...@news20.bellglobal.com> Date: Thu, 28 Mar 2002 19:15:00 -0500 NNTP-Posting-Host: 216.209.123.91 X-Complaints-To: abu...@sympatico.ca X-Trace: news20.bellglobal.com 1017361140 216.209.123.91 (Thu, 28 Mar 2002 19:19:00 EST) NNTP-Posting-Date: Thu, 28 Mar 2002 19:19:00 EST Organization: Bell Sympatico Path: archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-04!supernews.com!upp1.onvoy!onvoy.com!news.maxwell.syr.edu!newsfeed1.cidera.com!Cidera!torn!webster!nf1.bellglobal.com!nf2.bellglobal.com!news20.bellglobal.com.POSTED!not-for-mail Xref: archiver1.google.com alt.ascii-art:16368 alt.seduction.fast:80602 comp.os.linux.advocacy:220837 comp.text.tex:43778 alt.flame.jesus.christ:74467 comp.sys.mac.advocacy:137232 comp.unix.bsd.openbsd.misc:14985 comp.unix.bsd.freebsd.misc:52944 comp.unix.bsd.misc:1266 sci.physics:165058
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