A stone hitting a pond can produce a tiny supersonic splash, a new study has found.
SUPERSONIC FLOWS IN ACTION | As a stone plunges into still water, it plows out a column of air. The column collapses in an hourglass shape, and the escaping air (in the video, the air is filled with smoke for visibility) shoots through the shrinking opening at supersonic speed.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.
