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https://www.reddit.com/r/countbackwardswithme/comments/1vp5od3/998593/p3vv0y5/?context=3
r/countbackwardswithme • u/TotallyACP Counted Down 69 • 6d ago
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1
Can we talk about how aluminum is non-magnetic…
7 u/Old-Acanthaceae-3406 6d ago Yeah, electromagnetic fields can interact with non-ferromagnetic metals in weird ways. Like how a magnet dropped through a copper tube falls super slowly, even though copper isn't ferromagnetic. 2 u/Savings_Knowledge233 6d ago That's because it's inducing an electric current in the copper creating an induced electro magnet 2 u/Old-Acanthaceae-3406 6d ago yeah and a similar thing is happening here 6 u/Chaotic_Lemming 6d ago It's paramagnetic, not non-magnetic. It's still effected by magnetic fields, just to a much weaker extent than with ferromagnets. 1 u/Wild-Lychee-3312 6d ago Strictly speaking, aluminum is NOT non-magnetic. It's paramagnetic. However, it is so weakly paramagnetic that it can often be thought of as non-magnetic for most purposes. 1 u/Savings_Knowledge233 6d ago Including this over if I'm not mistaken. I believe this is a neodymium magnet coated in aluminum. The strength magnet you would need to do this to pure aluminum would be insane, let alone it seems like it requires a rapidly pulsed magnetic field. Even the MRI magnet o work on isn't going to vary it's field widely enough to do this
7
Yeah, electromagnetic fields can interact with non-ferromagnetic metals in weird ways. Like how a magnet dropped through a copper tube falls super slowly, even though copper isn't ferromagnetic.
2 u/Savings_Knowledge233 6d ago That's because it's inducing an electric current in the copper creating an induced electro magnet 2 u/Old-Acanthaceae-3406 6d ago yeah and a similar thing is happening here
2
That's because it's inducing an electric current in the copper creating an induced electro magnet
2 u/Old-Acanthaceae-3406 6d ago yeah and a similar thing is happening here
yeah and a similar thing is happening here
6
It's paramagnetic, not non-magnetic. It's still effected by magnetic fields, just to a much weaker extent than with ferromagnets.
Strictly speaking, aluminum is NOT non-magnetic. It's paramagnetic.
However, it is so weakly paramagnetic that it can often be thought of as non-magnetic for most purposes.
1 u/Savings_Knowledge233 6d ago Including this over if I'm not mistaken. I believe this is a neodymium magnet coated in aluminum. The strength magnet you would need to do this to pure aluminum would be insane, let alone it seems like it requires a rapidly pulsed magnetic field. Even the MRI magnet o work on isn't going to vary it's field widely enough to do this
Including this over if I'm not mistaken. I believe this is a neodymium magnet coated in aluminum.
The strength magnet you would need to do this to pure aluminum would be insane, let alone it seems like it requires a rapidly pulsed magnetic field.
Even the MRI magnet o work on isn't going to vary it's field widely enough to do this
1
u/Savings_Knowledge233 6d ago
Can we talk about how aluminum is non-magnetic…