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Old 01-26-07 | 10:43 AM
  #49  
rknj
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Joined: Jun 2005
Posts: 326
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From: Cambridge, MA
Originally Posted by queerpunk
not opening on my work comp but i'm pretty sure i know this vid.

that's actually from sympathetic vibration induced by wind, iirc. every object has a frequency that, if it vibrates at that frequency, the vibration waves magnify - instead of ever canceling each other out, they build and build and build until, well, you have a seriously ****in' broken bridge. [can somebody check my physics explanation? i'm just tryin to remember from high school physics here] edit:: vocab word: RESONANT FREQUENCY.

that doesn't mean that steel isn't stiff or strong or any other adjective or characteristic.

cool video though.
Don't worry, I took enough physics & engineering classes to know the real cause was resonance. Just wanted to point out that even "stiff" metals like steel can flex surprising amounts.

Edit: Here's the wiki on resonance for anyone curious http://en.wikipedia.org/wiki/Mechanical_resonance
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