The discussion about whether or not an unpowered vehicle can be made to go directly downwind faster than the wind (DWFTTW) is ongoing. I was reading the comments this morning, and came across a link to this intriguing video, titled "Under the ruler faster than the ruler." It's starting to make me think that a DWFTTW cart is feasible.
In the video, I was surprised to see which direction the big wheel turned when the ruler was run across the top. I'm also quite impressed that this fellow and others are making models to conduct experiment, instead of simply speculating. Hooray for amateur science!
As I've requested in previous posts on this subject, if you have something to contribute to the discussion boards, please refrain from insults and name-calling.
A better understanding how a sperm swims its way toward an egg could help inform new treatments for male infertility. Researchers from the University of York have now come up with a mathematical formula to model how large numbers of moving sperm interact with fluid they’re swimming through. From the University: By analysing the head […]
Dr Gale Ridge is a public entomologist at the Connecticut Agricultural Experiment Station, where an average of 23 people a day call, write or visit; an increasing proportion of them aren’t inquiring about actual insects, they’re suffering from delusional parasitosis, and they’re desperate and even suicidal.
What could be more fun than a slingshot that shoots tiny airplanes? A slingshot that shoots tiny glowing airplanes of course! These toy planes are outfitted with ultra-bright LEDs, so you can fly all night without losing them in the trees.Whether you are a regular-sized child, or an overgrown adult one, these light-up flyers offer […]
You know the drill. You go to the dentist and they ask you how often you floss. You lie through your teeth and say, “every day!” (Bonus points if you have some cilantro or chives stuck in your gums from lunch). You don’t want to keep up the charade any longer, but rubbing that tiny strand […]
The Raspberry Pi Foundation has done outstanding work packing a fully capable desktop computer into a package the size of a deck cards—especially one that only costs $35. But if you already have a working laptop, why should you care? Oh, how much you have to learn. Besides operating well as a compact digital media hub, […]