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In cowboy films ricocheting bullets always make that cool petowowzzz sound, question is how do you spell that.?
oh and do bullet make that sound?
* I'm not sure how to spell that sound. try a spellchecker.
* I've heard a similar sound when ricocheting wooden beads launched from a slingshot. I figure that the projectile tumbles at high speed after glancing off somethin like concrete.
* Another weird sound is that made by bowling balls when launched through the air. The holes whistle, and as the ball turns, the sound warbles. At one point in the history of the Denver Mad Scientist's Club, we were determining the range of our air cannon. So we stood downrange with GPS in order to mark the point at which the ball landed. You could hear and see the ball in the air a long way off, so setpping out of the way wouldn't be too hard. We got about 3000 feet, or 1/2 mile.
firing bowling balls 1/2 a mile! remind me not to park at the back of the bowling ally . it really is a mad scientist club LOL
This video on youtube has been around for a while, its a wind powered car. It does my head in, it shouldnt work, but there it goes tearing across the desert upwind.
Its kind of like the "blow your own sail" myth
Couldn't the propeller be turning a drive shaft which, in turn, turns the wheels? It would work with the wind blowing in both directions but would also have its "strong" side. Just a thought.
I dont doubt that it moves, just how does it go faster than wind speed?
I know I'm late to this, but it doesn't go faster than the wind - when the wind is behind it, it crawls along. I think it may be moving purely because the wind is pushing the sails, not turning them.
As soon as it is heading into the wind, the sails are being turned the right way for driving the wheels, so the vehicle picks up speed (although the featureless terrain makes it very hard to tell exactly how much speed).
It still does my head in...
I was watching the "supersonic pingpong ball" this morning, and when they were having trouble getting the ball to burst through the tape on the long vacuum cannon, I found myself yelling at them not to use tape at the front: the vacuum would hold a thin sheet of acrylic in place, until the air built up in front of the moving ball, at which point the sheet would fall away, releasing the air cushion that was slowing the ball.
Can a room be reinforced for a Tornado shelter by using bed liner spray and normal sheet rock and 2x4s
Id like to know if you an jump of a rock, into a river and pull a fish out of the water to take home and cook. I have seen it on ads, small movies and billboards, is it really possible?
carbon nanotubes allow more H2 to be stored without so much pressure. I think its actually surface tension- or analagous to it.
Posted:Feb 2, 2008
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