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quote: A .0003 gram needle would move a 12 gram plastic casing? Irrelevant, since the magnetic force acting on the low mass needle is obviously well over 100 newtons. It would definitely move. But I can see that this is another case of "dammit, I will not let you prove me wrong", so I'm not...

quote: The amount of metallic material in the needle is miniscule and would in no way cause the casing of the compass to react to the magnetic field around it. It doesn't matter if the casing reacts. The point is that the needle would react, and (since it was obviously an extremely strong...

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