Magnetized lead bullets?

[benEzra]

In the presence of a strong magnetic field even copper becomes magnetic. It doesn't stay magnetized when the field is removed like steel will do.
I have seen bussbars carrying 1200 amps at low voltage In a copper leach plant exibit such a strong magnetic field that you could not carry a tool box past them without the tool box pulling over to the buss. It was hell on wrist watches.
Read the other thread on this subject.
Jim

That's not the copper being magnetized; that's the direct field created by the moving electrons themselves.

Paramagnetism, diamagnetism, and ferromagnetism are properties of atoms, but you don't need atoms to create a magnetic field, just moving charged particles. Any electrical current, even one flowing through a vacuum, creates a magnetic field.

 

[Jim Bell]

Hi Peter, Thanks.
I think what happens is the magnetic field sets up Eddy currents when make the non ferrous object appear magnetic. I think the same principle is used in the latest type of metal detectors.

 

[bowfin]

/*CSI gets their gun facts wrong all the time. All the time.*/

I second that assertation. I about lost it when they found potato on a bullet that was picked up at the muzzle, and then hitchhiked a ride, hanging on despite centrifugal force of the spin of the bullet and the impact into a body.

 

[hksw]

Hmm, I've never seen an episode of CSI but I think it might worth watching now simply for amusement in their parallel universe view of pseudoscience. I like a good laugh.

 

[thegodmanson]

ok Nosler and Win. put out a bullet for a while called "Fail safe" it had at 1 point 2 steel cups inside. Its a rifle bullet but maybe that was it LOL

 

[cracked butt]

I saw an episode of 'House' that had a far better grasp on the science of the MRI machine than CSI ever will. In the episode a prison inmate with lots of tatoos was put in an MRI knowing full well that it would be extremely painful because of the ferrous inks used in the tattoos.

 

[Mad Chemist]

Non-ferrous metals such as lead or copper can most definitely be influenced by magnetic fields when they are molten, but not magnetized and not after being solid. In fact, magnetic fields are using in some manufacturing processes to help align the composition in a specific manner, such as with some plastics, but obviously the plastic does not become magnetized.

To put a fine point on it, polar organic molecules can be oriented with magnetic fields during synthesis but not magnetized. In effect, they are manipulated by the field but it does not alter the electro-chemical properties of these monomers/polymers.

My favorite CSI BS scene is when the extremely hot detective is applying large amounts of luminol to a crime scene while wearing a tank-top. In reality this requires hazmat gear. I guess it's hard to show off your cleavage while wearing a moon suit.

JH

 

[Double Naught Spy]

Fine points are fine when they fill in gaps, clarify, or correct inaccuracies. They help the learning process.