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Desc:How do they work??
Category:Science & Technology
Tags:pipe, physics, SCIENCE!, fuckin magnets, neodymium
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Comment count is 14
Burnov - 2011-12-20
Appropriate tags.
baleen - 2011-12-20
Magnet suit in a giant copper tube? Slow-motion fun tunnels, can they work?
Jet Bin Fever - 2011-12-21
Don't ask, just do it!

GravidWithHate - 2011-12-20
Isn't it a thing where the magnet induces a current in the pipe, which creates a magnetic field, which attracts the magnet slowing it's descent, but also decreasing the induced current and strength of the magnetic field until it finds a nice equilibrium point for itself?
memedumpster - 2011-12-20
Yes, the technical term for which is "fucking magic."

pastorofmuppets - 2011-12-21
quantum pelicans all entangled with your cell phone 'n shit

duck&cover - 2011-12-20
Would it work with a pipe made out of another metal? Is there something that works even better than copper?
gmol - 2011-12-20
Copper works because it is 'paramagnetic', it has an unpaired 4s electron. Other things that would presumably work would be liquid O2.

I *think* this works because the induced field in the pipe has a toroidal shape and applies a force proportional to the entire magnetic flux of the neodynium magnet, as opposed to a small piece of it (like when he taps it from the outside).

That is still the coolest thing I have seen in ages.

gmol - 2011-12-20
I am an idiot, it is just induced eddy currents.

http://ajp.aapt.org/resource/1/ajpias/v66/i12/p1066_s1?isAutho rized=no

Jet Bin Fever - 2011-12-21


dododge - 2011-12-21
Aluminum gives the same result. If the magnets are strong enough you can feel the forces just by sliding the magnets quickly along the metal with your hand.

Ursa_minor - 2011-12-21
Hahah yah nice try Gmol jeez read a book or google a thing sometime.

Syd Midnight - 2011-12-25
Pull the neodymium magnets out from a dead HDD and rub them against the bottom of a heatsink, and you can feel the magnetic braking. And if you can get your hands on magnets + liquid nitrogen + a wafer of superconductor, you can really blow some fucking minds.

Pillager - 2011-12-21

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