Quote:
Originally Posted by cfg83
Could you make the argument that a massive amount of energy went into making the rare-earth magnet (plate tectonics), and that you are just making use of it?
CarloSW2
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Carlos, I have no idea how plate tectonics might be involved. The "rare earth" magnets (neodymium, samarium, etc.) I'm referring to are charged up in a high electromagnetic field during manufacture. The magnetic field of the planet is relatively low, and variations are measured in nanoTeslas per the reference at
Earth's Magnetic Field Calculators - Instructions
If you meant something else, please explain bearing in mind that I am not in any sense a person with a strong background in magnetic science nor quantum theory. I'm an experimenter, and base those experiments on gross behaviours of magnetism and lots of cut-and-try.
Thanks,
Bill Whedon