Skip to comments.
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
click here to read article
Navigation: use the links below to view more comments.
first 1-20, 21-32 next last
They are not NOT using materials with inherent magnetic properties.
1
posted on
04/10/2003 4:42:09 PM PDT
by
vannrox
To: All
SHOW YOUR PRIDE! SUPPORT FREE REPUBLIC!
|
|
Donate Here By Secure Server
Or mail checks to FreeRepublic , LLC PO BOX 9771 FRESNO, CA 93794
or you can use
PayPal at Jimrob@psnw.com
|
STOP BY AND BUMP THE FUNDRAISER THREAD- It is in the breaking news sidebar!
|
2
posted on
04/10/2003 4:44:36 PM PDT
by
Support Free Republic
(Your support keeps Free Republic going strong!)
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".
To: Willie Green
zap.
4
posted on
04/10/2003 4:45:14 PM PDT
by
martin_fierro
(Mr. Avuncular)
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.)
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
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?)
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?)
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...
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
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
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
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
To: *tech_index; *RealScience; sourcery; Ernest_at_the_Beach
To: ChemDoc
**Ping**
15
posted on
04/10/2003 5:13:27 PM PDT
by
TwoStep
(Ignorance can be cured, stupid is forever!)
To: vannrox
They are not NOT using materials with inherent magnetic propertiesI think you meant to say they are not using materials with strong* magnetic properties.
*retain significant, residual magnetism when exposed to a magnetic field.
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
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
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)
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.
Navigation: use the links below to view more comments.
first 1-20, 21-32 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson