From: Eleanor White <ewraven1.nul> Date: Sat, 11 May 2013 16:40:50 -0400 Archived: Sun, 12 May 2013 07:43:26 -0400 Subject: Re: David Sereda's Diminished Gravity Demo? >From: J. Maynard Gelinas <j.maynard.gelinas.nul> >To: UFO UpDates - Toronto <post.nul> >Date: Sat, 11 May 2013 23:16:30 +0800 >Subject: Re: David Sereda's Diminished Gravity Demo? >>From: Eleanor White <ewraven1.nul> >>To: post.nul >>Date: Fri, 10 May 2013 17:49:29 -0400 >>Subject: Re: David Sereda's Diminished Gravity Demo? >>>From: J. Maynard Gelinas <j.maynard.gelinas.nul> >>>To: UFO UpDates - Toronto <post.nul> >>>Date: Fri, 10 May 2013 18:43:55 +0800 >>>Subject: Re: David Sereda's Diminished Gravity Demo? <snip> Thanks for your reply and all the detailed commentary and links. I'd rather just address the specifics of the experiment, though: >Bushman then takes a nonconductive tube and a >conductive tube (I think copper) and drops cylindrical >neodymium magnets down each. Well, low and behold, down >the nonconductive tube it drops, accelerating at 1g >just like it ought on planet Earth. But, down the >copper tube, it strangely slows down. Verrrrry weird. Not weird at all. Lenz's Law predicts that. A falling magnet induces a current in the tube, and the induced current sets up a field which opposes the mechanical action of the falling magnet. But the original experiment was to drop two objects of the same outside shape through _air_. I don't see how Lenz's law would operate in air. Beyond the through-air trajectory, there were _two_ magnets bolted together - with their fields in opposition. That would, for practical purposes, mean Lenz's Law would not operate even in a conductive tube, because the net field is approximately zero. Eleanor White Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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