Date: Fri, 26 Sep 2003 20:23:41 -0700

Author: Martin Simon

Subject: Re: Flame deflection by magnetostatic field

Post:

Anyone that plays around with NdFeB magnets near flames should
remember that the Curie point is only 310 C.

Martin Simon
From pauld@exploratorium.edu Fri Sep 26 21:47:04 2003
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References: <4.2.0.58.20030926165247.0157a350@169.232.152.82>

Date: Fri, 26 Sep 2003 21:30:32 -0700 (PDT)
Subject: Re: deflect a flame 2
From: pauld@exploratorium.edu
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Hi Bill

I was thinking about filling soap bubbles with O2.

Paul D

> On Fri, 26 Sep 2003, Martin Simon wrote:
>> Good thinking Paul. I'll buy that explanation unless someone comes
>> up with a better one. The flame bubble is relatively diamagnetic
>> compared
>> to the surrounding air.
>
> If I try this with a non-turbulent argon stream (or N2 or O2 stream), what
> would be a good marker substance? Break open a july 4th smoke bomb? I
> bet that stuff doesn't need O2.
>
> Hmmm. What about a stream of extremely hot air from a nichrome wire?
> The density might be low enough to make a difference. This gives me an
> excuse to try the Schelerein trick with a superbright LED, telescope
> mirror, and a little video camera.
>
>
> (((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
> William J. Beaty SCIENCE HOBBYIST website
> billb@eskimo.com http://amasci.com
> EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
> Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci
>
From billb@eskimo.com Fri Sep 26 22:12:01 2003
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Date: Fri, 26 Sep 2003 21:55:29 -0700 (PDT)
From: William Beaty
To: tap-l@listproc.appstate.edu
Subject: Re: deflect a flame 2
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On Fri, 26 Sep 2003 pauld@exploratorium.edu wrote:

> Hi Bill
>
> I was thinking about filling soap bubbles with O2.

And then float them in a box half filled with CO2? Will the water film be
repelled more strongly than the O2 is attracted? This sounds familiar.
A couple of years ago someone discovered that oil globules suspended with
neutral buoyancy in a jar of alcohol+water are "repelled" by
supermagnets.

Hey! Water film repulsion! My original supermagnet trick was to put
a magnet in a bowl of water so it would distort the water surface. Well,
how about distorting the colors of bubble film? A thin film on a great
big bubble wand, and the edge of a supermagnet just on the other side.
Will the field be strong enough to alter the colors? What would a pattern
of tiny supermagnet disks do? Sort of like the eidophore projection TV
from the 50s. Sounds like another entry for the "silliest computer
graphics display technology" contest.

For more extreme forces, I wonder if the bubble solution would be ruined
if a tiny bit of water-based ferrofluid was added. Imagine dark grey
bubbles which hover underneather a magnet.



(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty SCIENCE HOBBYIST website
billb@eskimo.com http://amasci.com
EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci
From msimon@physics.ucla.edu Sat Sep 27 19:02:11 2003

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