🚀 go-pugleaf

Friends!
One of my ninth grade studenst raised her hand right at the end of class.
When she started with "Is it true that....." I thought that it would be
something like UFO's or anyhting to get us off the subject of magnetostatics.
But, I was pleasantly surprized. She asked "Is it true that a metal coat
hanger hung from a string and undisturbed will align itself north-south?" In
20 years I had never heard this one so, I said lets find out!
Fortunately we had a coat hanger left over from the "spin-the-
penney-in-a-circle" demonstration and I hung it in the center of the
classroom by a thread on its hook. The bell rang and they all left. When I
returned to lock up the room, sure enough it was pointing N-S.
I tried it at home and it did not work. Has anyone seem this written up in
the literature?
Paul