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You are in a room where there are no metal objects except for two iron rods. Only one of them is a magnet. How can you identify this magnet?
An easier way would be to take one rod and touch it to the center and ends of the other rod. If the rod is just as strongly attracted to the center and ends of the other rod than the former is the magnet
the Answer is:
You can hang the iron rods on a string and watch which one turns to the north (or hang just one rod).
float it on water and see if it turns north???
see which one attracts the other one???
that is another way I suppose =)
Nope try again