This thread originates from within 'usenet', and as such the content and users are not guaranteed to have been moderated by our community. Don Phillipson:[nq:1]I'm watching the Simpsons. Bart says Eat my shorts a lot and I know it's some kind of insult. But I'm just wondering what SHORT means in this sentence.
Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.
Permanent magnets can lose their magnetism if they are dropped or banged on enough to bump their domains out of alignment. Can you turn something back into a magnet by banging on it in a specific way? How do you build a powerful electromagnet that will attract a large metal object from a distance of four inches away?