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: 10eb3b,53f9f7cceb4d817f X-Google-Attributes: gid10eb3b,public X-Google-Thread: 107d75,4a81179a975b6945 X-Google-Attributes: gid107d75,public X-Google-Thread: 10cbb9,53f9f7cceb4d817f X-Google-Attributes: gid10cbb9,public X-Google-Thread: f996b,53f9f7cceb4d817f X-Google-Attributes: gidf996b,public X-Google-Thread: f9391,53f9f7cceb4d817f X-Google-Attributes: gidf9391,public X-Google-Thread: fcfb9,d0123b843bd8782d X-Google-Attributes: gidfcfb9,public X-Google-ArrivalTime: 2002-04-01 17:15:06 PST Path: archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-01!supernews.com!207.217.77.43.MISMATCH!newsfeed1.earthlink.net!newsfeed.earthlink.net!feed2.news.rcn.net!rcn!netnews.com!xfer02.netnews.com!newsfeed1.cidera.com!Cidera!feed.news.sonic.net!typhoon.sonic.net!not-for-mail From: Timberwoof 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: <3CA18BA6.1C0@_REMOVETHIS_erols.com> <3CA1691A.88F49844@csse.monash.edu.au> <3CA1966B.605@_REMOVETHIS_erols.com> <3CA173D1.7487D861@csse.monash.edu.au> <3CA2179C.198B6F6F@greyREMOVErock.org> <3CA37136.7E82003F@greyREMOVErock.org> User-Agent: MT-NewsWatcher/3.1 (PPC) X-Face: /+dsZp_X}b*<_Q]W|ZY*WQYU`Xi<3eZbDC3g_TW[I&?HD@BcBbCrwy\8|Ii~* 2Ah/Eb'6n=8d\/(&!2]H*u$pLjt Lines: 39 Date: Tue, 02 Apr 2002 01:10:26 GMT NNTP-Posting-Host: 209.204.188.144 X-Complaints-To: abuse@sonic.net X-Trace: typhoon.sonic.net 1017709826 209.204.188.144 (Mon, 01 Apr 2002 17:10:26 PST) NNTP-Posting-Date: Mon, 01 Apr 2002 17:10:26 PST Xref: archiver1.google.com alt.ascii-art:16524 alt.seduction.fast:80730 comp.os.linux.advocacy:222919 comp.text.tex:44072 alt.flame.jesus.christ:74710 comp.sys.mac.advocacy:138269 comp.unix.bsd.openbsd.misc:15077 comp.unix.bsd.freebsd.misc:53322 comp.unix.bsd.misc:1285 sci.physics:166209 In article , "arjay" wrote: > "Timberwoof" wrote ... > > Elizabeth 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?) What do you mean, "Nope"? That's what I said. -- Timberwoof Chief Perpetrator Infernosoft: Putting the No in Innovation. http://www.infernosoft.com "The opposite of hardware is not easyware."