Date: Sat, 23 Apr 2005 19:43:49 -0700

Author: Paul Doherty

Subject: Re: candle flame deformed by magnets - Just wondering?

Post:

Hi Dick

You should see how LOX grabs on too the pole of a magnet!
It's strongly paramagnetic.

I fill a metal bowl with liquid nitrogen, LOX condenses on the outside
of the bowl and drips off the bottom onto a black inclined plane. (Be
careful with LOX if it contacts anything combustible a fire will
result.)

The LOX drops slide down the plane (leidenfrost effect) passed the pole
of a large neodymium where they are deflected by the paramagnetic
attraction force.

Oxygen filled soap bubbles are also attracted to strong magnetic poles.
(Something else that Dr. Takikawa showed me but I didn't put on
videotape, yet.)

Have fun , I look forward to your results so I can learn how to do it
all better.

Paul D


On Apr 23, 2005, at 7:26 PM, Dick Heckathorn wrote:

> Greetings,
>
> I took three of the trapezoidal magnets with a birthday candle and I
> did
> see the flame being deflected from the magnets.
>
> You said you view it as buoyancy. But what is the force bending it
> away?
> Further how can you be sure that the oxygen moves toward the magnet
> pole?
>
> Just trying to understand at a basic level.
>
> Dick
>
>
>
>
> Helping teachers who facilitate, motivating students who learn.
> Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
> 440-826-0834
> Physics Teacher CVCA 4687 Wyoga Lake Rd Cuyahoga Falls, OH 44224
> 330-929-0575 VM 120
> www.cvcaroyals.org/~rheckathorn
> Physics is learning how to communicate with ones environment so that is
> will talk back.
>
>
> -----Original Message-----
> From: owner-tap-l@listproc.appstate.edu
> [mailto:owner-tap-l@listproc.appstate.edu] On Behalf Of Paul Doherty
> Sent: Saturday, April 23, 2005 7:30 PM
> To: tap-l@listproc.appstate.edu
> Subject: Re: candle flame deformed by magnets - Just wondering?
>
> Hi Dick
>
> I view it as buoyancy, the oxygen is attracted to the magnet pole, the
> flame is less attracted, the oxygen moves toward the magnet pole
> deflecting the flame away.
>
> Paul D
>
>
> On Apr 23, 2005, at 3:09 PM, Dick Heckathorn wrote:
>
>> Greetings,
>>
>> In looking at the explanation, I read:
>>
>> "What's Going On?
>> Oxygen in the air is attracted to the magnet. But inside the candle
>> flame, the oxygen has been removed by the very chemical reaction that
>> made the flame glow. As oxygen rushes toward the magnet, the
>> oxygen-free
>> flame is forced to bend in the opposite direction."
>>
>> What is the force that bends the flame in the opposite direction? If
> it
>> is magnetic, what has the specific pole (same as the near side of the
>> magnet) that the magnet's pole exerts the repulse force on?
>>
>> Could there be an electric force? I wonder due to the ionization that
>> is
>> taking place as the air is heated?
>>
>> Dick
>>
>>
>> Helping teachers who facilitate, motivating students who learn.
>> Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
>> 440-826-0834
>> Physics Teacher CVCA 4687 Wyoga Lake Rd Cuyahoga Falls, OH 44224
>> 330-929-0575 VM 120
>> www.cvcaroyals.org/~rheckathorn
>> Physics is learning how to communicate with ones environment so that
> is
>> will talk back.
>>
>>
>> -----Original Message-----
>> From: owner-tap-l@listproc.appstate.edu
>> [mailto:owner-tap-l@listproc.appstate.edu] On Behalf Of Paul Doherty
>> Sent: Friday, April 15, 2005 4:18 PM
>> To: tap-l@listproc.appstate.edu
>> Subject: Re: candle flame deformed by magnets
>>
>> Hi Jerry
>>
>> You can see a viseo of a flame deflected by a NIB magnet
>> http://www.exploratorium.edu/explore/trythis.html
>>
>> There is also a write-up on how to do this .
>>
>> Oxygen in the air is paramagnetic,
>> the flame is depleted in oxygen and so is less paramagnetic.
>> The air is more attracted to the magnet pole than the flame is and so
>> the
>> flame is defelcted away from the magnet face. Think bouyancy.
>>
>> Paul D
>>
>>> Tappers,
>>>
>>> An instructor wants to demo an experiment done by Faraday
> showing
>>> that permanent magnets cause candle flames to deform into equitorial
>>> disks. According to him, the explanation has to do with the net
>>> paramagnetism of the atmospheric gases and the net diamagnetism of
> the
>>> combustion gases (most things that burn are diamagnetic). I couldn't
>> find
>>> anything like this in the DCS, and a quick try with a candle and NIBs
>>> produced no results. Has anyone heard of this experiment?
>>>
>>>
>> Jerry
>>>
>>> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>>>
>>> Jerry DiMarco
>>> Manager of Lecture Demonstrations and Instructional Labs
>>> Montana State Univ., Physics Dept.
>>>
>>> Bozeman, MT
>>>
>>> Our Motto: "There's a demo in there somewhere."
>>
>
From urs.lauterburg@phim.unibe.ch Sun Apr 24 08:36:53 2005

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