Fun with Neodymium Magnets.

SoulAssassin

Diamond Member
Feb 1, 2001
6,135
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Yeah, but I dunno if a dried out bone he got from a turkey or something is really representative of what it would do to a living human finger. Not saying it wouldn't hurt like a bitch but I don't know if it would crush the bone in the same way.

Also, I don't know if it's technically accurate or not but he needs to come up with a better name than "homopolar" motor.
 

tboo

Diamond Member
Jun 25, 2000
7,626
1
81
Originally posted by: SoulAssassin
Yeah, but I dunno if a dried out bone he got from a turkey or something is really representative of what it would do to a living human finger. Not saying it wouldn't hurt like a bitch but I don't know if it would crush the bone in the same way.

Also, I don't know if it's technically accurate or not but he needs to come up with a better name than "homopolar" motor.

Just look at the photos Dirk sent of his finger
 

40Hands

Diamond Member
Jun 29, 2004
5,042
0
71
I love these magnets! That finger thing is really no joke. I read on another site that sells these about two of the stronger ones completely crushing a child's entire hand.
 

Loreena

Senior member
Oct 30, 2008
297
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LOL nerds and their toys.

I got a nasty blood blister from playing with them.

Ball magnets are much safer and neat to sculpt with. They will also destroy any magnetic strips on your credit cards and kill floppies if you still use those. :Q

The large bar magnets are really dangerous. Those can come together with such a force that they will chip off and launch shrapnel that can embed right in your skin.
 

robphelan

Diamond Member
Aug 28, 2003
4,084
17
81
You shouldn?t eat more than 1 of them.

If the possibility of magnets in the abdomen exists, magnetic resonance imaging (MRI) must be avoided. An MRI machine would literally rip the magnet out of the body through the belly.
:Q
 

0roo0roo

No Lifer
Sep 21, 2002
64,795
84
91
Originally posted by: SoulAssassin
Yeah, but I dunno if a dried out bone he got from a turkey or something is really representative of what it would do to a living human finger. Not saying it wouldn't hurt like a bitch but I don't know if it would crush the bone in the same way.

Also, I don't know if it's technically accurate or not but he needs to come up with a better name than "homopolar" motor.

yea his videos could use work. framing is bad, and the visuals of the experiments tends not to be well thought out.
 

Locut0s

Lifer
Nov 28, 2001
22,205
44
91
Originally posted by: Locut0s
Some really neat experiments on video here. Need to get me some of these.

http://magnetnerd.com/

Here's a site that sells them if anyone's interested:

http://www.unitednuclear.com/magnets.htm

Love this quote:

"
If carrying one into another room, carefully plan the route you will be taking. Sensitive instruments like computers & monitors will be affected in an entire room. Loose metallic objects and other magnets may become airborne and fly at great speed to attach themselves to these magnets. If you get caught in between the two, you can be severely injured. These magnets will crush bones in the blink of an eye.
Two of these magnets close together can create an almost unbelievable magnetic field that can be incredibly dangerous.
Of all the unique items we offer for sale, we consider these items the most dangerous of all. Our normal packing & shipping personnel refuse to package these magnets - our engineers have to do it. This is no joke or exaggeration - and we cannot stress it strongly enough. You must be extremely careful - and know what you're doing with these magnets.
"
:Q
 

jagec

Lifer
Apr 30, 2004
24,442
6
81
Originally posted by: robphelan
If the possibility of magnets in the abdomen exists, magnetic resonance imaging (MRI) must be avoided. An MRI machine would literally rip the magnet out of the body through the belly.
:Q

That applies to pretty much any decent sized chunk of metal...MRI machines create an appallingly strong magnetic field.
 

Mark R

Diamond Member
Oct 9, 1999
8,513
16
81
Originally posted by: jagec
Originally posted by: robphelan
If the possibility of magnets in the abdomen exists, magnetic resonance imaging (MRI) must be avoided. An MRI machine would literally rip the magnet out of the body through the belly.
:Q

That applies to pretty much any decent sized chunk of metal...MRI machines create an appallingly strong magnetic field.

An MRI almost certainly would not rip the magnet through anything, but that's not to say it wouldn't cause some form of injury - the forces generated by an MRI magnet on metal objects are large, but they're not usually large enough to rip through flesh (unless the object is unusually sharp, or anchored in some way - e.g. a piercing). The concern is more that if the metal object is in a sensitive area, it may pull on a delicate organ (e.g. the eye, where any movement could cause bleeding into the eye leading to permanent blindness).

This is definitely the case in the abdomen, where a swallowed magnetic object could be pulled with sufficient force to tear some blood vessels and cause internal bleeding, or possibly, though I think this unlikely, enough to tear the intestinal wall.

Firmly attached metal objects - e.g. joint replacements, spinal rods to hold a broken back, etc. are all fine for MRI as they're firmly attached and won't move. Even shrapnel injuries aren't really a problem, as they tend to be lodged in muscle or bone, and won't move in these tough tissues. The main problem with metal objects is that if they're near the bid being scanned, they ruin the picture - especially if they're ferromagnetic. Modern implants tend to be made of titanium, which isn't feromagnetic, which causes minimal problems.

 

Locut0s

Lifer
Nov 28, 2001
22,205
44
91
Originally posted by: RedSquirrel
Magnets are so fun! I need to buy me some of these. Only problem I have PCs and servers in my house, so probably a bad idea. :p

Yeah I though of this too, I'm thinking of buying a couple of these and some iron filings! I'll just keep this stuff out of my computer room.