MAGNET MAGIC / SUPER CONDUCTORS

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.

Category:

Science & Technology

Tags:

• MAGNET
• MAGIC
• SUPER
• CONDUCTORS

[Nirdian]

faKE?

[brucegray666]

No, science.

[DeathXLight28]

that kind of gas cause too much right..?? and it must be cooled below absolute zero

[brucegray666]

Don't know about the cost of it but I do know that it impossible to cool anything below absolute zero - it just cant be done!

[esdlive]

actually that's why there are different medition parameters...

in centigrees, de 0º actually represents the point that at normal conditions the wather turns into ice... the absolute zero is the farenheit 0.. and thats when all molecules stop moving.. sort of -127º (something like that... google it)

[brucegray666]

Asolute zero is 0 degrees KELVIN, not farenheight. It's the equivalent of -273 degrees C.

[Darkslither]

real life hackers ... damn noclip phys objects

[Peterwhitlock]

Ok

so in space this stuff can make non contact machine parts?

Never wear or tear stuff?

what applications has Humanity come up with for this in cold space? i can't find any!

[ManijakTotalni]

Fucking magnets...

[ricosauve08]

i bet the answer to perpetual motion is somewhere in the understanding of that because if it were in a vacum it technicaly should just keep spinning because there is no friction. it makes you wonder what else is out there that we havent figured out yet. science is awesome and confusing.

[GAspieler]

@DeathXLight28

it is liquid nitrogen and it costs less than 10$ / liter.

[Tamalain]

@brucegray666 Niquid Nitrogen is much warmer than LOX , LHe, or LH. It cost less to produce and tends to stay colder longer than most gasses. Still, to use it large scale, the power cost outway the benifits you might get from the SC currently in use. We need to get Conduvters up to dry Ice temps before they would be effective in a commercial use.

[btmonson]

@DeathXLight28

It's not the cost of the gas, it's the cost of cooling it. Researchers have blown millions trying to achieve absolute zero and have gotten close, but not quite there. It is theoretically impossible to achieve true absolute zero. The only way to do it would be to shield off every bit ofthe heat from the rest of the universe with a perfect insulator. Of coarse, in our world, perfection does not exist.

[improductive]

when things get soo cold they turn to a super conductor... electricity can pass through it without loosing electricity

[alihaggis78]

Unfortunately they do have to be that cold at the moment. This is actually what would be termed a high temperature superconductor. The first generations of superconductors had to be cooled with liquid helium which is much colder. Reserch is still continuing to find new superconductors that will work at even higher temps with hopes of producing one that will work at room temp.

As for your levitating bed I'm affraid you'd have to be magnetised to float above a superconducting mattress.

[ryusassori15]

lol'd at comment.. (im a Garry'smod veteran XD)

[mygaffer]

Wow, what an awesome technology. Do they have to be so cold to work though? Imagine the things you could do with that technology if you don't have to keep it super cold. I would get a levitating bed to sleep in.