Needles are composed of a single material,
is attracted to magnets - unless they have a gold
coating on the eye of the needle. I don't
understand 'thrown through a magnet' - Is your
magnet a circle or a horseshoe? Most of mine
are just rectangles or disks.
It's a fun and easy experiment - get a needle and
a magnet. Move different parts of the magnet
toward different parts of the needle. I think my
needle got magnetized, because it seemed to change
its behavior, when I moved the same end of the
magnet toward the middle of the needle, after
moving them around each other a few times.
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