Copper ions in solution moving between two electrodes in a magnetic field produce a swirling motion that can easily be displayed on an overhead projector. Place some pepper on the surface of the ...

Place the apparatus on an overhead projector and focus on the floating pepper ... Connect the positive and negative wires from a DC power source to the copper electrodes. The solution should start to ...

Plug the power supply into the transformer. Use the electrodes to connect the power supply to the electrophoresis tank. Put the electrophoresis tank on the projector. Put the fuse box in the tank and ...