Re: pinhole Re: Generation of heat

From: Paul Doherty (pauld@exploratorium.edu)
Date: Fri Oct 26 2001 - 16:32:41 PDT

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Message-Id: <l03110702b7ffa1dbbe35@[192.174.2.173]>
Date: Fri, 26 Oct 2001 16:32:41 -0700
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole Re: Generation of heat

Hi John

You can smell burning paper if you strike the balls around the paper and
smell the hole quickly after.

The paper thickness matters. Try onionskin tracing paper and different
weight bond paper.

The size of the balls matters, too big or too small spheres don't work.
A sphere versus an anvil doesn't work.

It's an interesting problem which I think involves sound waves travelling
around the balls arriving back at the point of contact for both balls
simultaneously, over and over again.
Paul D

Paul "But it is more complicated than that!" Doherty,
Senior Staff Scientist, The Exploratorium.
pauld@exploratorium.edu, www.exo.net/~pauld

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