Start up five metronomes at different times and you get a ticking cacophony. But place those five tickety-tackety timekeepers onto a board spanning two soft drink cans, and something miraculous happens.
We’re not physicists here, but we’re told this perfect synchronization happens because of the Law of Momentum Conservation. Also, the fact that all the metronomes are coupled by their common base contributes to the magic.
The resulting effect is oddly satisfying. If only the world worked this way.
Via Music Thing