Who Can Explain This

This is an excellent demo of super conductivity. The liquid is liquid nitrogen. The disk is a magnet. The black block is the super conducting (SC) material (but becomes SC only below its critical temperature, somewhat higher than liquid nitrogen).

When warm, the block has no particular magnetic / electric properties. When cooled, it becomes a SC. One of the properties of a SC is that magnetic fields can be pinned in place in the SC.

A moving magnetic field generates eddie currents within conductors, and can be felt as a resistance to relative motion. In most materials, this current quickly decays due to electrical resistance. In SC, eddie currents do not decay, but instead will tend to hold the magnetic field in place.

Who needs magic?

now can anyone say that david blaine and criss angel cant levitate????.... its all chemicals ...for levitation its helium

מה שרואים בסרטון נקרא "אפקט מייזנר", והחלקים המשתתפים בו הם: קערת קלקר לבנה (לשמירה על טמפ' נמוכה של החנקן הנוזלי), עיגול שעשוי ממגנט פשוט, וקוביה שעשויה מתערובת מסוימת שהופכת לעל- מוליך החל מטמפ' נמוכה מזו של חנקן נוזלי. על מוליך הוא מצב צבירה של חומר, אשר מתקבל בטמפ' הקרובות מאד לאפס המוחלט (273.15- מעלות), ועבור תרכובות מעשה יד אדם, טמפ' אלו יכולות להיות גם גבוהות יחסית (177- חנקן נוזלי). במצב העל מוליכות (בנוסף להיות החומר בעל התנגדות חשמלית אפס), החומר נהיה בעל "דיאמגנטיות=1-", כלומר החומר העל מוליך מיצר תמונת מראה של כל שדה מגנטי שמוקרן עליו (במקרה הזה המגנט מקרין עליו), ומה שמתקבל זה קיזוז של כוחות מנוגדים והמגנט נדחף כלפי מעלה במקום ליפול ארצה. במצב זה ישנה תופעה של "זיכרון" מגנטי, כלומר העל מוליך זוכר איך שמנו את המגנט בהתחלה ומשמר את המצב הזה.

MAGLEV train comment guy is right; Meisner effect, known for, oh, at least 80 years... However, the coolant appears to be liquid nitrogen, which means the metal is not typical type 4 superconductor (eg. niobium), but probably "high temp" superconductor. That is, relatively modern variation of Meisner effect.

שנטבלת בחנקן נוזלי כמדומני

Isn't it??

this effect is called the meissner effect, where the magnet is levitated due to the repusion caused by the eddy currents that are induced in in such a direction in the superconducting material, that they repel the magnetic field of the magnet on top and hence levitate it. the material at the bottom is made to superconduct by adding liquid nitrogen to it.

That is so awesome. I did that at work in 1988. We had a lot of LN in the building and I bought the ceramic SC and the magnet in a mail order catalog Edmond Scientific. I showed it to all my coworkers. Physics is so fun, but requires discipline in order to attain stuff like this. Even this can be dangerous in the wrong hands. I also had some liquid helium in one of our experiments, our dewar had a leak and air got in and froze. Looking at frozen air now that is bizarre.

Thats a sik experiment!! Haha Hovercrafts for everyone!

great

The Amazing Levitron is much better then this S**t ...

That's why I quitted sciences...

cause its so cold down there that the lil metal circle just doesnt want to go there =X

ignore my last comment.. something screwy is going on with my being able to view comments today... ignore me!!!

wtf!!!!!! someone please elaborate??

i like how he made it spin around

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The block in the center of the bowl is a high temperature superconducter such as Yttrium barium copper oxide. (High temperature is considered to be above 77 K, or -196 C, the boiling point of liquid nitrogen) The effect which floats a magnet is called the Meissner effect. This is the occurence of the magnetic field inside a superconductor becoming zero. This will levitate a magnet as long as the magnetic field does not exceed the critical magnetic field. The magnet stays still because the field lines are not perfect due to flaws in the crystaline structure.

... i believe that is the scientific term for what is happening in that video

..Wish my science teacher could show us stuff like this...There again, they cant afford new desks nevermind Liquid Nitrogen..

yes this was on another vid on here

But it feels great. Nice demo and comments. Informative

that person had really fat hands

Ja, Its really informative, put more

It is good picture and knowledgeable. I have seen many picture or clip on this website but i like this the most. please put some more pic if available. thanks

CRAP!

Now if they could only do this to buildings or people, then it might be useful.

I can do some Jedi sh!t with that!

This is very intrsting physics trick. can click some great idea to develope the new things.

I want to contact with this film maker/submitter to know where he get this film clip. because i have a great idea but i need some more information about this.

its just a superconductor.. at room temp the black thing (magnet) is just metal..but when you pour liguid nitrogen on it the magnet becomes a superconductor and can hold up the shiny disc
-simple

...just witnessed the worlds first tractor beam prototype? Anyone done warp drive yet?

love the fact people think god is somehow involved or its a trick ha! ya can buy a small block of the superconductor online and the magnets!

what if you put that in a sealed pressurised container, wouldnt you have a free source of pushing kinetic power, there must be a way to harness those properties to generte electricity, come on people lets think of it, I am sick of all this pollution!

its just science.... if i was a freekin master nerd scientist i could do that!! hounest~~~ no seriously!

i dont care anyway

WOW... Just checked out PrimerMovie.com to see what was new. Someone has actually taken the time to break down the "timeline". FOLLOW THE STEPS!
primermovie.com . look for "ten steps".

Anybody interested in what you have seen here and are even the least bit interested in the prospect of time travel and how SC's can be involved MUST check out the independent film "Primer". This film was shot in documentary mode (not a big fan), yet, I have watched it 5 times (so far).
P.S. Don't bother watching the trailers, untrue to films content, film goes much deeper into science of SC's. If enough of you watch, be prepared for heated debates. There is actually a website devoted to discussion of this film.

Hell yeah, thats awesome. I know theres somthin with magnets man, we need to put more money into researching magnets and magnetic fields.

IRON???THEY ARE CURIOUS!!!

Great vid! One thing that wasn't mentioned in any of the comments ... SC magnets, like those used in cyclotrons, can be so powerful that they can S**k the iron right out of your blood. So it makes me wonder if one day they will find that commuting on a magnetically suspended and propelled train on a daily basis may cause health problems.

I loved that! Bring on more!!!

//

cool man cool

have they discovered the graviton yet, and therefore started looking for an antigraviton?

the theory is that gravity is the only field that doesn't rely on a subatomic particle like an eletron, its also the only one without a complimentary force, so theoretical physicists invent a subatomic particle and then go about proving it exists... like they did with the neutrino.

... I tried this once. It was very exciting ! I have done a lot of experiments and such things. This one is the 3rd most exciting experiment i have done. The most exciting was very facinating, I melted iron, with some COLD water ! It was unbelieveable !

That is so sweet.

its magic we do the same with sheep and a welly

interesting

UFO Technology? The earth is a giant magnet.

This is reasl that thingin the middle is a magnet then positive and negative dont match like wen you get a mmagnet and put them oposite ways and they move away from each other by themsleves but i dont kbnow at that liquid is it might even be liquid nitrogen?

Approaching -200 - very minus, odd Fahrenheit, this will occur. I need some shut-eye. Let's pick this up in the AM, HST. Stephen.

ok now i am going to start paying attention in science class.

put some more like this one

WILD!

new

but as to controlled levitation, check out the lifter project at jlnlabs.org Lot's of videos there.

Another great source of info is American Antigravity. And once you have checked the background, you can buy yourself a lifter from Applied Electro gravitics [but remove the space between electro and gravitics].

:)

Did you hear about the MAGLEV train? Its based on the same phenomena, super conductors are perfectly diamagnetic (repel a magnetic field completely) and zero electrical resistance (current ramains running forever is a conductor).

It would be cool to put if they put the liquid beneath Some type of Car body with no wheels and line metal sheets to roads, And there ya go Hover Crafts that create no Friction and Ozone safe. And Also if ya have a wreck the liquid then can Cryopreservati your body. Then can be cloned and live happily ever After

Super Conductivity

Not sure of the exact dynamics that cause this but super cooling the one material causes it to exhibit both attraction and repulsion magnetic forces.. which is why the small object would hover wherever he placed it and why he could also pick up the supercooled material with the unmagnetized metal bearing.

but at first nothing happened, then when they pored the liquid on it, it reacted whith it, or something, and if it was opposing forces how could he pick up one of the magnets and the other magnet not stay on the table?

I wonder if somehow you can levatate objects using this method? Hmmm I wonder...

is the theory of ufos

FAKE

The fact is that these people are hte people who blow up our buildings, our young boys and men, and shoot at our civilians in hotels. As you can hear the british guy filming say "shoot at us will you". These people you see being beat are not "innocient" or in anyway above this. They are the enemys soldiers, they don't wear uniforms and they don't stand out, so any man of 'fightin age' is a soldier and to be treated as such. and if you catch a soldier you punish him, once these people where down and actualy subdued they where left alone, but when they where still kicking and fighting htey where hit with sticks. which do not apear to be more then just pieces of wood.

this is marshall law and you'd expect to see the same thing done in our own countries if this was the situation.

Good work british soldiers, and in no way did htey disgrace anyone. Look at the outcomes of hte mohammad cartoons, these people are in the 3rd world and act like it but expect to be treated like they own the world, first they need to get their heads out of their asses and realise that they don't own the world, and they arn't the be all and end all. Infact they're quiet ininsignificant.