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science?
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| dj aki |
here
what's the liquid that he put? |
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| DJPG |
| I gotta admit that's cool :crazy: |
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| Lumps |
| doing dumb like that makes me wish I got into chem in school. |
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| pornodoll |
| Wow! Somebody explain please? |
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| P4z! |
| that's liquid nitrogen he's pouring in. |
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| Fundamental |
| That was really cool, but can anyone explain what the hell's going on and how?! |
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| eternity4ever |
| wow....that amzing :eyes: |
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| pornodoll |
Magnet in dish. Liquid nitrogen supercools magnet which has the effect of 'freeing up' the magnetic fields enabling them to flow much more freely and support the disc.
As the magnet is removed, it warms up, the magnetic fields experience more resistance and hence, reduce, and don't work so well. |
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| DJ_Science |
| The block is a superconducting material (high-tc, probably YBCO). At room temperature the material is not a superconductor, but when submerged in liquid nitrogen (which is the liquid poured on) it is cooled below its transition temperature and the material becomes superconducting. In this state it ejects all magnetic fields within the material. To do this, the material creates a field around the outside of the material. This is the field which levitates the magnetic block. When the material is removed from the liquid it warms up and the superconducting state is lost. The resistance in the material increase and the external field is collasped. Any Questions? |
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| Pettiscool |
| dj science pulls through. |
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