If Ed Scruggs, of Austin, Texas, hadn’t seen it for himself, he might never have believed it. But there it was on his 11-year-old daughter’s X-ray: a string of tiny, super-strong spherical magnets in ...
If you want a strong magnet, the obvious answer is to buy one. However, for a variety of reasons, you might want to combine several smaller magnets. There are a few ways to do this, but the Halbach ...
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