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The basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. Ferromagnetism manifests itself in the fact that a small externally imposed magnetic field can cause the magnetic domains to align and reinforce with each other, so that the material is said to be magnetized.

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Would it be possible to design a system of magnets that could disable a gun at any point in ...

For the sake of this question, let's say I were the secret service, and wanted to install a system of magnets that could disable the weapon of someone in the oval office. This should be able to target …
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