>From Harry: > All you need is a pool, a plate, and some food color. Physics girl > does an experiment that cause weird black circles to form just be > dragging a plate through a pool. On a nice clear sunny day you can > see the black circle vortex travel through the whole pool. How does > this happen? Watch and learn. > > http://www.sun-gazing.com/physics-girl-unique-crazy-pool-vortex/
Thanks Harry. Fun! While we are on the subject of vortices, there exists another extremely intelligent species cohabitating our planet who also know quite a bit about the physics of vortices. It's clear they have become quite adept in figuring out how manipulate them too. https://www.youtube.com/watch?v=bT-fctr32pE Regards, Steven Vincent Johnson svjart.orionworks.com zazzle.com/orionworks
