Magnets aren't attracted to copper, but when the two come together they can appear to defy gravity. Download the Magnetic Copper PDF (384 Kb). Adobe Acrobat is required. SAFETY: Neodymium magnets ...

the magnets create a rapidly flipping magnetic field. To test this setup, [Tim] used a scrap of copper pipe with a bit of water inside. Holding it over the magnets as they whiz by rapidly heats ...