Posted on 04/29/2017 8:28:20 PM PDT by Yardstick
A fun thing you can do with these is demonstrate para-magnetic materials.
These metals are not attracted by magnets but the metals (like silver) do not like to pass through a magnetic field.
Take a silver coin and try to rub it around on the magnet and it becomes hard to move.
This is one of the tests you can perform on silver coins to test if it is a fake. It the coin sticks to the magnet it’s obviously fake or if it does not resist moving through the magnetic field it’s fake. Many fakes are made primarily of nickle which is not para-magnetic. If the fake has some silver it will resist movement across the magnet but it will be obvious it’s not pure silver since it moves so much easier than a real coin.
Dynamo- Humm?
Great googly moogly!
(oh wait, wrong Zappa song)
CC
Holy cow! My chance to become a superhero has arrived!
I assume that means placing one of these magnets on each side of your head.
I might just give it a try.
I wonder if they can be used to wipe a hard drive?
In a round box.
So you were attracted to these magnets and could not resist the pull.
I wonder if they can be used to wipe a hard drive?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Do you mean like putting them in a cloth?
LOL!
We’ve bought lots of N42 and N48 Neodymium magnets. INCREDIBLY STRONG. Turned out to be too strong for my sons’ science project.
Lois Lerner showed that hammers work better.
So you’re saying that these are some strong magnets?
I am brainstorming a way to levitate my classic analog turntable to isolate it from ANY vibrations.
You got me thinking.
I got some fairly strong ones which are disks, slightly smaller than a silver dollar. They shipped them in a box about 4 inches four inches by six inches. Each magnet was wrapped inside a corrugated cardboard strip rolled up so there were about six layers of cardboard around each one, more than an inch on each side. They will stick together even with that much cardboard between them. Put one [still wrapped in cardboard] in a little paperclip tray and it will suck up all the paper clips.
One problem with them is they are really fragile. If one smashes into another, they can break and pieces can go flying, and will stick to any metal they encounter.
You can get them rubber coated which reduces this risk.
They are really nasty.
Funny you should ask. I get all my refrigerator magnets from inside of old hard drives. There are 2 magnets in every 40 GB hard drive that goes into e-waste. I take the drives apart and get the magnets out. They are super sticky!
I use one of these to strip the magnetite out of my Gold panning concentrates. Yes, there’s Gold in Ohio. I’ve often wondered as an engineering designer most of my working career what little was done with magnetics since the invention of the electric motor. It’s like a technology that got stuck in time, after reading about the Nazi Bell, maybe there’s a reason for that.
I give the reviews 1 star. Not as funny as the Haribo gummi bears https://www.amazon.com/Haribo-Gold-Bears-Gummi-Candy-5-Pound/dp/B000EVOSE4/ref=sr_1_1_a_it?ie=UTF8&qid=1493530772&sr=8-1&keywords=gummy%2Bbears%2Bsugar%2Bfree&th=1
The Amazon reviews of banana slicers are pretty funny, too.
Maybe check out this then: Sugar Free Gummy Bears
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.