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This is a large-scale demonstration of the interaction between period and pendulum length, using 16 bowling balls hung from a wooden frame. The length of time it takes a ball to swing back and forth one time to return to its starting position is dependent on the length of the pendulum, not the mass of the ball. A longer pendulum will take longer to complete one cycle than a shorter pendulum. The lengths of the pendula in this demonstration are all different and were calculated so that in about 2:40, the balls all return to the same position at the same time.
Posted 3 years ago by wolfram33 in category: interesting   Comments (0)


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A 12-step program for introducing a new cat to your existing cat. Results may vary.
Posted 3 years ago by boyt in category: animals   Comments (0)


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This video never goes old.
Posted 3 years ago by WTsimmons in category: music   Comments (1)



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Rube Goldberg machine
Posted 3 years ago by SkullDer in category: commercials   Comments (0)


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Watch as a large chunk of the Twain Harte Rock rupture and crack. Amazing footage from the top of the rock as the cracking and rupturing are seen up close. The video was taken from Mid-August in the Sierra Nevadas at Twain Harte Lake.
Posted 3 years ago by boyt in category: crazy   Comments (0)