You have two identical looking metal bars. One of them is a magnet, with North and South ends. The other is simply an iron bar (which is attracted by magnets).
How can you tell which is which, using only these two bars?
well, if depending on whether the two have to be intact for this to be considered a solution. Break either into 2 pieces, push the two pieces together. The reason why this works is obvious.
Posted by andrei
on 2005-01-26 08:45:49