fun with metronomes

[Frank Eliot]

They are mechanically coupled. Notice toward the end of the video that the base that they are all resting on is moving. Years ago I saw a demo of two pendulums, each swinging from a bar drilled into a brick basement wall and several feet apart. Each pendulum was driven by a magnetic kick each time it passed through dead center, similar to the Foucault pendulum at the Smithsonian. Over a period of days, the two pendulums would synchronize. As I recall, they put an air baffle between them to eliminate air currents. It was apparently the very small movement of the brick wall that synched them up.

On Apr 24, 2013, at 10:41 12PM, wb5mmb wrote:

> I think I understand a bit of how this works.
> 
> http://www.wimp.com/synchronizingmetronomes/
> more here
> http://www.youtube.com/user/IkeguchiLab
> 
>     Sandy
>     WB5MMB
> 
> _______________________________________________
> Tacos mailing list
> Tacos at amrad.org
> https://amrad.org/mailman/listinfo/tacos