Friday, March 22, 2013

http://www.youtube.com/watch?v=U23iwbVX-Dk

4 comments:

Jacob said...

http://www.youtube.com/watch?v=GHynpJnxjU4

Luke said...

It's pretty amazing.

Pop said...

What is causing it to vibrate? Is it because of the shape of the metal releasing heat more slowly from the center where its thicker than from the ends where its more thin? Really curious how it generates motion. Sounds just like a chainsaw when the screwdriver presses on the rod. Wow!

Jacob said...

Wiki explains it. Something to do with the heat on the "rocked up" side dissipating more rapidly causing the metal to contract and rock the object back to that side. I have also noticed that the more heat conductive the surface is that it is resting on the better it works. I couldn't get it to work on a sheet of glass but the metal stove top worked.