s also happen to be of the strongest magnets known to mankind
. And guess what? You happen to be sitting near one right now. The magnets in most hard drive
s are neodymium magnets. If you have some old harddrives laying around, don't throw them away! Rather, bust them open and steal
their magnets! You'll be surprised at how strong
Recently, I did an experiment wherein I got hold of three tubes: one copper, one aluminum, one plastic (the control). I dropped a neodymium magnet down each of the tubes and the results were amazing. The magnet dropped down the copper tube actually fell slower than 9.8m/s2 (the acceleration of gravity). The aluminum also had a slight effect and, of course, the plastic PVC pipe had no affect on the rate of fall. All this was due to Lenz's Law and the strength of the magnet.