Physics/gaming geekery
Apr. 24th, 2007 01:07 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
lederhosenPuzzle for physics geeks: Take one nonconducting icosahedron (that's a d20 for all you gamers). Replace its edges with 1-ohm resistors, connected at the vertices, so you now have a web of thirty resistors.
What is the resistance between opposite corners of the icosahedron?
(There are two ways I know of to do this one. The hard way involves a lot of simultaneous equations; the easy way takes about five seconds of mental calculation, once you know the trick.)
What is the resistance between opposite corners of the icosahedron?
(There are two ways I know of to do this one. The hard way involves a lot of simultaneous equations; the easy way takes about five seconds of mental calculation, once you know the trick.)
