For this activity, you will need a small bar magnet, a
Chapter 19, Problem 19.71(choose chapter or problem)
For this activity, you will need a small bar magnet, a small plastic container, and a bowl of water. Tape the magnet to the bottom of the container, and oat the container and magnet on the surface of the bowl as in Figure A19.1. The magnet and the container should rotate and come to equilibrium, with the magnet pointing along a northsouth line. The compass you have constructed is similar to the type used by early sailing vessels. How can you determine which direction is north and which is south?
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