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Location: UFOUpDatesList.Com > 2013 > May > May 12

Re: David Sereda's Diminished Gravity Demo?

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



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