?? I didn't notice anything different about it. I thought you were saying we should stop drinking when everything looks smiley
Back on topic, coil circumference is linear to coil radius, so average per-coil wire length is equal to the middle of the range of coil radius.
And the next one i'm gonna guess; the magnet like-poles repulsion is equal to the weaker magnet repulsion MINUS the magnetic attraction of the strong magnet to the core material of the weaker magnet. Ie if the weaker magnet is weak enough it's actually attracted to the stronger magnet.