<table><tr><th>From:</th><th>David Grosof on behalf of David Grosof</th></tr><tr><td>Sent:</td><td>We nes ay, Ju y 6, 2011 7:01 PM</td></tr><tr><td>To:</td><td>jeevacation@gmail.com</td></tr><tr><td>Subject:</td><td>Pendulum waves - a lovely physics demonstration</td></tr></table>

http://sciencedemonstrations.fas.harvard.edu/icb/icb.do?keyword=k16940&pageid=icb.page80863&pageContentId=icb.pagecontent341734&state=maximize&view=view.do&viewParam_name=indepth.html#a_icb_pagecontent341734

David Grosorf

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