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Scientists levitate gold coins
BBC News ^ | Published: 2003/04/10 07:19:37 | BBC News

Posted on 04/10/2003 4:42:08 PM PDT by vannrox

Scientists levitate gold coins

Scientists have shown that levitation is not just a trick from a Harry Potter book.

Researchers at the University of Nottingham have used magnetism to make solid objects such as coins float in the air.

Scientists have already proven strong, varying magnetic fields could exert an upward force on objects in their path.

The Nottingham team found this effect could be dramatically enhanced in cold, magnetised oxygen.

Magnetic levitation occurs when the magnetic force is strong enough to overcome gravity and balance a body's weight.

Cold oxygen provides extra buoyancy through the "magneto-Archimedes" effect - literally allowing an object to float in the air.

No conjuring trick

Laurence Eaves and colleagues at the University of Nottingham's School of Physics and Astronomy used the technique to levitate a gold coin, a £1 coin, two kinds of crystal and a piece of lead.

They wrote in the journal Nature: "In magnetic levitation, a strong and spatially varying magnetic field exerts an upward force on a body that is sufficient to counteract its weight due to gravity.

"Here we show that this effect can be enhanced by immersing the body in cold oxygen gas, which provides a further strong and adjustable buoyancy force that allows a wide range of materials to be levitated in an open, unpressurised vessel."

The objects could be moved simply by adjusting the strength of the magnetic field. But the experiment is more than a conjuring trick.

According to the scientists, the technique could be adapted for use in separating minerals.



TOPICS: Business/Economy; Culture/Society; Extended News; Foreign Affairs; Government; News/Current Events; United Kingdom
KEYWORDS: fe; ferrite; gold; gravity; levitate; magnetic; neo; podkletnov; realscience; science; techindex; technology; unusual
They are not NOT using materials with inherent magnetic properties.
1 posted on 04/10/2003 4:42:09 PM PDT by vannrox
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2 posted on 04/10/2003 4:44:36 PM PDT by Support Free Republic (Your support keeps Free Republic going strong!)
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To: vannrox
Several years ago, I saw a show on one of those science channels wherein folks magnetically levitated frogs and spiders. Don't recall whether the show was "Beyond 2000" or "The Next Step".
3 posted on 04/10/2003 4:45:13 PM PDT by Vroomfondel
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To: Willie Green
zap.
4 posted on 04/10/2003 4:45:14 PM PDT by martin_fierro (Mr. Avuncular)
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To: vannrox
That's interesting.

Do the materials assume magnetic properties once they are in the cold oxygen?

Practical uses other than separating metals?
5 posted on 04/10/2003 4:45:43 PM PDT by DannyTN (Note left on my door by a pack of neighborhood dogs.)
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To: vannrox
thats cool. now if they can do something to levitate my stock portfolio, they would really have something going.
6 posted on 04/10/2003 4:47:09 PM PDT by MrFred
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To: vannrox
About three years ago I saw a special on TV where they used high magnetic fields to float a strawberry and a live frog.

7 posted on 04/10/2003 4:47:22 PM PDT by Dead Corpse (For an Evil Super Genius, you aren't too bright are you?)
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To: Vroomfondel
Ya' beat me to it. I guess it pays to read more than the lead article before posting....
8 posted on 04/10/2003 4:48:02 PM PDT by Dead Corpse (For an Evil Super Genius, you aren't too bright are you?)
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To: Vroomfondel
magnetically levitated frogs and spiders

IIRC, it was the iron in the hemoglobin in the blood that was reacting to the magnetic field...

9 posted on 04/10/2003 4:50:55 PM PDT by fourdeuce82d
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To: vannrox
I wonder if the magnetic field is producing the force, or if gravity is in fact an electromagnetic property, instead of a fundamental one?
10 posted on 04/10/2003 4:51:25 PM PDT by zoso82t
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To: vannrox
They are not NOT using materials with inherent magnetic properties.

They're using materials that are electrically conductive. Electricity and magnetism are two aspects of the same force. A varying magnetic field will induce an electric current in a conductor that in turn generates a magnetic field counter to the original, producing a repulsive force.

It's how some kinds of maglev train proposals work. Decades ago I saw cute plans for an aluminum (non magnetic) hotplate that would float a few inches above the table. Electromagnetic coils (under the table) generated the levitation force and the induced current also kept the plate hot.

The bit about cold oxygen is interesting (how many people know that oxygen -- particularly liquid oxygen -- is magnetic?), but none of this is earth shaking.

11 posted on 04/10/2003 4:59:51 PM PDT by algol
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Just recently I visited a museum in Minneapolis, MN called 'The Bakken'. There were videos showing a levitated frog among other things. They described in detail exactly how it works. Really crazy stuff.
12 posted on 04/10/2003 5:02:26 PM PDT by nofate
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To: vannrox
Don't let anyone tell you gold isn't going up. the only question now is how high?
13 posted on 04/10/2003 5:03:01 PM PDT by templar
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To: *tech_index; *RealScience; sourcery; Ernest_at_the_Beach
http://www.freerepublic.com/perl/bump-list
14 posted on 04/10/2003 5:06:38 PM PDT by Libertarianize the GOP (Ideas have consequences)
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To: ChemDoc
**Ping**
15 posted on 04/10/2003 5:13:27 PM PDT by TwoStep (Ignorance can be cured, stupid is forever!)
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To: vannrox
They are not NOT using materials with inherent magnetic properties

I think you meant to say they are not using materials with strong* magnetic properties.

*retain significant, residual magnetism when exposed to a magnetic field.

16 posted on 04/10/2003 5:15:40 PM PDT by Amerigomag
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To: templar
Don't let anyone tell you gold isn't going up.

I can make gold float. Place all you gold here & I, the great one, can make it arise!! I accept vissa, am ex, mas card, etc. Send me your Gold, I will make it rise.

17 posted on 04/10/2003 5:48:51 PM PDT by jrushing
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To: vannrox
"Here we show that this effect can be enhanced by immersing the body in cold oxygen gas, which provides a further strong and adjustable buoyancy force that allows a wide range of materials to be levitated in an open, unpressurised vessel."

I live down south, but I hear that up North, they have cold oxygen immersion fronts that cause the water to become hard & provide a strong buoyancy force that can cause human bodies to levitate on hard water in an open & unpressurised vessel!!! Has anyone ever actually seen this??

18 posted on 04/10/2003 6:04:29 PM PDT by jrushing
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To: vannrox
I've levitated several liberals with my boots.
19 posted on 04/10/2003 6:06:50 PM PDT by husky ed (FOX NEWS ALERT "Generalissimo Francisco Franco is still dead" THIS HAS BEEN A FOX NEWS ALERT)
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To: fourdeuce82d; algol
IIRC, it was the iron in the hemoglobin in the blood that was reacting to the magnetic field

I believe the frog levitation relied on a property of materials called diamagnetism. This is a weak repulsive force that is not the same as ferromagnetism (the strong magnetic property of iron-like materials). I seem to recall that they also levitated strawberries, which have no hemoglobin, but do have water, which is diamagnetic.) Unfortunately, extremely strong magnetic fields are required for this technique, so it's not so practical for levitating larger objects.

I believe the levitating coins is based on a third type of magnetism. Oxygen is paramagnetic, meaning that it is weakly attracted to a magnetic field. In this experiment they appear to have induced a density/pressure gradient in high pressure oxygen using a strong magnetic field. The coins then float at this gradient.

20 posted on 04/10/2003 6:09:27 PM PDT by wideminded
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To: vannrox
I really miss Art Bell, the new guy just doesn't do it for my restless nights.
21 posted on 04/10/2003 6:09:48 PM PDT by Brian S (YOU'RE IT!)
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To: fourdeuce82d; algol
Gold is diamagnetic, which enhances the levitating effect.
22 posted on 04/10/2003 6:12:35 PM PDT by wideminded
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To: wideminded
This is a weak repulsive force that is not the same as ferromagnetism (the strong magnetic property of iron-like materials). I seem to recall that they also levitated strawberries, which have no hemoglobin, but do have water, which is diamagnetic.)

fourdeuce note to self: Do not blather on about crap you don't understand. Do not blather on about crap you don't understand. That is all.

*grin*- thanks for the clarification!

23 posted on 04/10/2003 6:59:11 PM PDT by fourdeuce82d
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To: vannrox
I've gotten old. I have something that needs to be
"re-levitated."
24 posted on 04/10/2003 7:20:49 PM PDT by UnklGene
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To: vannrox
I thought this had all been done years ago.
25 posted on 04/10/2003 7:23:18 PM PDT by error99 (this space for lease)
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To: William Wallace
FYI
26 posted on 04/10/2003 8:33:18 PM PDT by Rippin
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To: MrFred
now if they can do something to levitate my stock portfolio
You mean they didn't make it disappear yet? I'll have to notify David Copperfield.
27 posted on 04/10/2003 9:59:58 PM PDT by patriot5186
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To: wideminded
" I believe the frog levitation relied on a property of materials called diamagnetism."

You are correct. The two materials with the strongest diamegenetic properties are carbon and bismuth. You can buy kits on the web that allow you to do levitation experments. Search with google for lecitation and bismuth or graphite...
28 posted on 04/10/2003 10:31:35 PM PDT by babygene (Viable after 87 trimesters)
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To: wideminded
"Gold is diamagnetic"

Only slightly... and way too expensive. Bismuth is better and fairly easy to get. You can buy no-tox shotgun shells at many sporting goods stores and take the bismuth pellets out. It has a melting point and weight that is very close to lead, but it is less toxic, hence it's use in some shotgun shells.

It's diamagnetic properties are more than an order of magnatude better than the closest other metal.
29 posted on 04/10/2003 10:37:35 PM PDT by babygene (Viable after 87 trimesters)
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To: vannrox
Probably would cause humans brain tumors.
30 posted on 04/10/2003 10:47:56 PM PDT by A CA Guy (God Bless America, God bless and keep safe our fighting men and women.)
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To: vannrox
Greenspan is levitating gold coins with the simple of use of his computer by creating money out of thin air.
31 posted on 04/21/2003 7:45:51 AM PDT by B. A. Conservative
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To: vannrox; Swordmaker; KevinDavis

bttt

How to float like a stone
David Adam, science correspondent
Wednesday May 11, 2005
The Guardian
http://www.guardian.co.uk/uk_news/story/0,3604,1481009,00.html

Open Letter to the Scientific Community
New Scientist | May 22, 2004 | see signatures
Posted on 03/28/2005 11:44:29 PM PST by Swordmaker
http://www.freerepublic.com/focus/f-chat/1372828/posts


32 posted on 05/17/2005 9:21:40 AM PDT by SunkenCiv (FR profiled updated Tuesday, May 10, 2005. Fewer graphics, faster loading.)
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