/sci/ - Science & Math

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Anonymous Tue Oct 18 06:39:12 2011 No.3919320 [Reply] [Original]

just a quick question, /sci/: how in the actual fuck?

http://www.youtube.com/watch?v=Ws6AAhTw7RA

>>	Anonymous Tue Oct 18 06:46:12 2011 No.3919337 I wonder how much weight can it hold, if any?

>>	Anonymous Tue Oct 18 06:48:12 2011 No.3919343 >>3919337 wouldn't bigger magnet hold greater weight?

>>	Siegfried !84wCgAg.OU Tue Oct 18 07:30:12 2011 No.3919467 >>3919343 size=/=strength

>>	Anonymous Tue Oct 18 07:34:12 2011 No.3919471 I was just watching this and came here to ask the exact same question. Amazing, but I'm curious about this "quantum locking"

>>	Anonymous Tue Oct 18 07:35:12 2011 No.3919473 >>3919320 dont know, something cool and complicated i guess. something similar and cool: read up on the properties of superfluids on wikipedia (typically liquid helium)

Anonymous Tue Oct 18 07:40:12 2011 No.3919480

The locking is apparently due to flux pinning which is a separate phenomenon.

A short summary I found elsewhere is:

Flux pinning occurs when some magnetic fields penetrate the superconductor in discrete "tubes" through the imperfections (along the grains) of the superconductor. In order for flux pinning to happen, you must have an extremely thin superconductor (in the case of the video, it's actually a sapphire crystal wafer with a 1-micron thick coating of superconductor ceramic material).

(Pulled from the comments here: http://www.guardian.co.uk/science/punctuated-equilibrium/2011/oct/18/1?newsfeed=true))

>>	Siegfried !84wCgAg.OU Tue Oct 18 07:46:12 2011 No.3919503 >http://arxiv.org/abs/0803.3090 Semirelated. http://www.youtube.com/watch?v=6lmtbLu5nxw&feature=related

>>	Senjougahara Hitagi 「ニア愛」 !!yKw8mGNXxz6 Tue Oct 18 07:49:12 2011 No.3919513 Take electricity and magnetism. A field of equal and opposite strength is created if the conducting material is a super conductor.

>>	Anonymous Tue Oct 18 07:57:12 2011 No.3919529 http://en.wikipedia.org/wiki/Superconductivity

>>	Anonymous Tue Oct 18 08:07:12 2011 No.3919560 >>3919337 Notice how the guy is moving it around, I doubt it can hold ANY weight.

>>	Anonymous Tue Oct 18 08:09:12 2011 No.3919566 >touching with bare hands

>>	Anonymous Tue Oct 18 08:15:12 2011 No.3919582 >>3919566 You can dip your hand in molten lead or liquid nitrogen without any injury.

>>	Anonymous Tue Oct 18 08:20:12 2011 No.3919600 >>3919582 ...You first.

>>	Schrödinger's Cat !wgGzbQSudw Tue Oct 18 08:24:12 2011 No.3919610 >>3919582 In high school science class I let my teacher pour liquid nitrogen onto my hand. Felt a little chilly, nothing more. Also he's only touching it for only about a second at a time.

>>	Anonymous Tue Oct 18 08:27:12 2011 No.3919618 >>3919600 http://www.youtube.com/watch?v=UZio0f7fP04#t=368s http://www.youtube.com/watch?v=2rHoD3mjGwc

>>	Anonymous Tue Oct 18 09:40:12 2011 No.3919750 >>3919618 http://en.wikipedia.org/wiki/Leidenfrost_effect

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