MRI MAGIC

Watch these Biomed Techs (what I am training for now) put a solid hunk of metal in the field of an MRI machine, and it will fall in slow motion because of the powerful magnetic field. A field strong enough to pull a metal screw out of your body like a bullet shot.

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[PostTheMissing]

The aluminum is NOT magnetic. When the aluminum is placed into a magnetic field its creates a flow of electrons that make an electromagnet that REPELS the magnetic field entering it, so it falls very slowly. The flow flow of electrons creates friction as they flow, and thats why it heats up and DOESNT FLOAT. However, there are superconductors that dont produce any friction(or very low friction at least) and they do float, so check out some videos about that.

Hopefully that can help someone out

[Mednovotob]

Not all metals are attracted to magnets, only alloys of Iron, Nickel and Cobalt. This means most steels and the metals in most batteries (plus a host of other things). Aluminum, Titanium, Brass, Copper, Zinc, and many others aren't magnetically attracted.

However, all electrically conductive materials (like metals) are subject to the Lenz effect, which is what you're seeing here. Essentially, a conductive material in a magnetic field becomes resistant to motion by counter fields.

[NOOBEEEEE]

Too funny. I have to wait at least six months for an MRI of my head.

NOW I know why!!

[Tobias Gilk]

Actually it *does* work with linear motion, too. Launch a non-magnetic and highly-conductive projectile right down the 'tunnel' and it will come to an abrupt halt at the mouth of the bore. Dr. Emanuel Kanal, MRI guru, made a 4-inch aluminum sphere and has a bungee-cord cannon he launches it from.

[PassTheLoot]

Can MRI see thru aluminum?

[oguretsagressive]

It would be a total kickass if it slowly fell down right from the air, not touching any surface. But, I suppose, the effect requires rotation, not linear movement, does it?

[areneephoto]

However, it is 20,000 times stronger than the earths magnetic field. Powerful eyes. Please, do not have one if you have metal in your eyes O_O

[areneephoto]

MRI is a magnet composed of 3 gradients (smaller magnets). A screw will not shoot out of your body unless made of solid metal and in soft tissue without healing. Come on....

[SmallShielsy]

It's like magic! how does it work?