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Anna Shetty: on 7/9/18 at 9:05am UTC, wrote This article is useful for know about the root security of the containers....

jing boo: on 5/7/18 at 10:38am UTC, wrote Je veux porter une montre simple et élégante: pas de garniture...

Ian Harris: on 9/27/14 at 2:45am UTC, wrote Very entertaining video! Great experiment to demonstrate physics concepts. ...

Schatzie Dudee: on 9/12/14 at 19:13pm UTC, wrote Great job! Lots of cool explosions! Congratulations on a wonderful job. If...

David Atai: on 8/8/14 at 21:38pm UTC, wrote Video Image Video URL ...


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September 21, 2021

CATEGORY: Show Me the Physics! Video Contest (2014) [back]
TOPIC: Creating A MAGNET by David Atai [refresh]
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David Atai wrote on Aug. 8, 2014 @ 21:38 GMT
Video Image

Video URL

Video Description

Two things we need to know: 1. Super conductivity phenomena hold the property of no current resistance. so no energy lose. 2. If we set an external magnetic field on a closed conductive loop (ring! in our case) and change the magnetic field, currents will appear such that the total field will be unchanged (because currents produce magnetic field). Story: we use the non energy lose and the field conservation to lock a magnetic field in a super conductive material (our material: YBCO - Yttrium barium copper oxide). The YBCO at a normal phase is non-conductive. He become superconductive at about 90 Kelvin (which is about 183 Celsius). so we need to freeze he's ass to put him in SUPER CONDUCTIVE PHASE (which of course make the material conductive!) We use a MAGNET to induce constant external magnetic field and then we remove it. Removing the field is basically a change in the magnetic field through the YBCO ring. Field conservation (its called Lenz's Law if interested) cause currents to show up and they Produce a MAGNETIC FIELD!! So we transformed a non magnetic material into a magnetic material which can hold forever and ever and ever as long there is no energy lose. good luck .

Video Co-Creator(s)

Daniel Bannit, Ben Gurion University

Video Creator Bio

Two normal physics students. One is the strong guy and the other is the beautiful one. We study at Ben-Gurion University and were partners at the teaching labs. We love coffee. one drinks more turkish coffee and the other more enjoys cappuccino. One time we went to the desert together with 4 more friends and we succeeded to calculate the trajectory of most of the celestial object except comets due to lack of data but we made a pretty ruff estimation which no one knows if its good enough or not. thanks!

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Schatzie Dudee wrote on Sep. 12, 2014 @ 19:13 GMT
Great job! Lots of cool explosions! Congratulations on a wonderful job.

If you get a moment, can you please vote on our 2 short videos? We would appreciate it:

Thanks so much!

Schatzie Dudee and kids

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Ian C Harris wrote on Sep. 27, 2014 @ 02:45 GMT
Very entertaining video! Great experiment to demonstrate physics concepts.

If you get a chance I'd really appreciate it if you gave our video a watch and rated it as well!

Thanks in advance,

Ian Harris

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jing jingboo boo wrote on May. 7, 2018 @ 10:38 GMT
Je veux porter une montre simple et élégante: pas de garniture supplémentaire, pas de boutons supplémentaires, seulement des aiguilles juniors, peut-être quelques caractéristiques de date, replique montre mais ça doit être un look classique. Bien sûr, il y a des centaines de montres qui satisfont cette condition. La taille spéciale est légèrement réduite à 38mm. L'épaisseur des cosses et du boîtier est appropriée. La beauté de la Rolex antique, en particulier les cosses, l'avant et le milieu Le processus de tréfilage en une pièce a été fait avec un côté poli miroir, mais la montre en or n'a pas été traitée comme une section en acier avec un coin plat, et la courbe latérale était beaucoup plus douce. Bref, c'était la beauté de la vieille montre.replique montre de luxe La couronne elle-même est assez épaisse, donc elle est non seulement pratique pour l'enroulement et le réglage, mais elle évite aussi les mauvaises opérations. Soit dit en passant, il s'agit d'une couronne à vis, avec une résistance à l'eau de 100 mètres rarement visible sur une table officielle.

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Anna Shetty Shetty wrote on Jul. 9, 2018 @ 09:05 GMT
This article is useful for know about the root security of the containers. I got the knowledge of working of containers with the root behavior with the kernel.

run 3

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