fluid dynamics

OK, I'm officially stumped. Why aren't there high-speed biplanes? The answer I'd always heard was the extra drag from the additional wings and the bracing, which forever relegated biplanes to lower speeds. Looking at these drag curves though...

I've noticed that the trail left by a boat consists of sea far smoother than the sea outside the wake. I reckon this is because the propellers/hull etc churn up so many waves that they have a greater chance of canceling out. But interestingly enough the trail lasts quite a long time, longer...

Well, you just have to see the Kaye Effect in action. It's an interesting feature of fluid dynamics and can be demonstrated using a dropping stream of shampoo. Demonstration and explanation of Kaye Effect - YouTube More Kaye Effect - YouTube Still more - "lanyard of shampoo" Leaping...

Howdy -- A friend of mine forwarded me this video of strange behaviour of viscous fluid, in this case shampoo, highlighting something called "the Kaye Effect." I also found this other really cool video of experiments done with water spheres in space. Maybe I'm a geek, but I think these are...

http://www.nature.com/nsu/030217/030217-11.html Swedish physicists claim that spinning balls (soccer 'bending', baseball 'curve ball') would swerve in the opposite direction on Mars. Something to do with atmospheric density.