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STRING WALKS AND SILLY WALKS
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STRING WALKS AND SILLY WALKS
Classical silly walks:
http://www.forbes.com/2008/02/28/bri...29physics.html Brian Greene: "Einstein discovered that if you and I synchronize our watches, and then you sit still while I run to and fro, when we rejoin and compare our watches, we'll find that less time has passed on mine than on yours. In short, motion through space slows the passage of time....By 1915, with his "General Theory of Relativity," Einstein took these realizations one step further, concluding that something similar happens in a gravitational field. He figured out that the stronger the gravity you experience, the slower time elapses. After synchronizing our watches, were I to stay in the lobby of the Empire State Building while you went sightseeing on the observation deck, I would experience stronger gravity (being closer to Earth) and according to Einstein, when we rejoin, my watch would be behind yours." http://hyperphysics.phy-astr.gsu.edu.../bugrivet.html http://www.math.ucr.edu/home/baez/ph...barn_pole.html "These are the props. You own a barn, 40m long, with automatic doors at either end, that can be opened and closed simultaneously by a switch. You also have a pole, 80m long, which of course won't fit in the barn....So, as the pole passes through the barn, there is an instant when it is completely within the barn. At that instant, you close both doors simultaneously, with your switch. Of course, you open them again pretty quickly, but at least momentarily you had the contracted pole shut up in your barn." Pentcho Valev |
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STRING WALKS AND SILLY WALKS
Extremely silly string walks:
http://query.nytimes.com/gst/fullpag...C0A9629C8B 63 Brian Greene: "As we pass each other in the street, this rotation is imperceptibly tiny; that's why common experience fails to reveal the discrepancy between our respective senses of past, present and future. But just as a tiny angular shift will cause a rocket to miss a distant target by a large margin, the tiny angular shift between our notions of now results in a significant time discrepancy if our separation in space is substantial. If instead of being next to me, you were 10 light years away (and moving at about 9.5 miles an hour), what you consider to have happened just now on earth would include events that I'd experienced about four seconds later or earlier (depending on whether your motion was toward or away from earth). If you were 10 billion light years away, the time discrepancy would jump to about 141 years." Pentcho Valev |
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STRING WALKS AND SILLY WALKS
On Jul 28, 11:40*am, Pentcho Valev wrote:
Extremely silly string walks: http://query.nytimes.com/gst/fullpag...1E3EF932A35752.... Brian Greene: "As we pass each other in the street, this rotation is imperceptibly tiny; that's why common experience fails to reveal the discrepancy between our respective senses of past, present and future. But just as a tiny angular shift will cause a rocket to miss a distant target by a large margin, the tiny angular shift between our notions of now results in a significant time discrepancy if our separation in space is substantial. If instead of being next to me, you were 10 light years away (and moving at about 9.5 miles an hour), what you consider to have happened just now on earth would include events that I'd experienced about four seconds later or earlier (depending on whether your motion was toward or away from earth). If you were 10 billion light years away, the time discrepancy would jump to about 141 years." Pentcho Valev Silly String. Mitch Raemsch |
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STRING WALKS AND SILLY WALKS
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STRING WALKS AND SILLY WALKS
On Aug 2, 10:40*am, Pentcho Valev wrote:
World Silly Walks Festival: http://www.comedycentral.com/colbert...videoId=167386 http://www.baylor.edu/pr/news.php?ac...ry&story=52090 "Dr. Gerald Cleaver, associate professor of physics at Baylor, and Richard Obousy, a Baylor graduate student, theorize that by manipulating the extra spatial dimensions of string theory around a spaceship with an extremely large amount of energy, it would create a "bubble" that could cause the ship to travel faster than the speed of light. To create this bubble, the Baylor physicists believe manipulating the 10th spatial dimension would alter the dark energy in three large spatial dimensions: height, width and length. Cleaver said positive dark energy is currently responsible for speeding up the expansion rate of our universe as time moves on, just like it did after the Big Bang, when the universe expanded much faster than the speed of light for a very brief time. "Think of it like a surfer riding a wave," said Cleaver, who co-authored the paper with Obousy about the new method. "The ship would be pushed by the spatial bubble and the bubble would be traveling faster than the speed of light." The method is based on the Alcubierre drive, which proposes expanding the fabric of space behind a ship and shrinking space-time in front of the ship. The ship would not actually move, rather the ship would sit in a bubble between the expanding and shrinking space-time dimensions. Since space would move around the ship, the theory does not violate Einstein's Theory of Relativity, which states that it would take an infinite amount of energy to accelerate a massive object to the speed of light. String theory suggests the universe is made up of multiple dimensions. Height, width and length are three dimensions, and time is the fourth dimension. String theorists use to believe that there were a total of 10 dimensions, with six other dimensions that we can not yet identify because of their incredibly small size. A new theory, called M-theory, takes string theory one step farther and states that the "strings" that all things are made of actually vibrate in an additional spatial dimensional, which is called the 10th dimension. It is by changing the size of this 10th spatial dimension that Baylor researchers believe could alter the strength of the dark energy in such a manner to propel a ship faster than the speed of light. The Baylor physicists estimate that the amount of energy needed to influence the extra dimension is equivalent to the entire mass of Jupiter being converted into pure energy for a ship measuring roughly 10 meters by 10 meters by 10 meters. "That is an enormous amount of energy," Cleaver said. "We are still a very long ways off before we could create something to harness that type of energy." The paper appears in the Journal of the British Interplanetary Society." Pentcho Valev |
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STRING WALKS AND SILLY WALKS
Incredibly silly string walks:
http://fr.youtube.com/watch?v=pO0kik...eature=related Much cleverer silly walks: http://fr.youtube.com/watch?v=i5Jyu6eioZ4 Pentcho Valev |
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STRING WALKS AND SILLY WALKS
On Aug 24, 2:04*am, Pentcho Valev wrote:
Incredibly silly string walks: http://fr.youtube.com/watch?v=pO0kik...eature=related Much cleverer silly walks: http://fr.youtube.com/watch?v=i5Jyu6eioZ4 The importance of sillywalking in science: http://www.perimeterinstitute.ca/Out...blic_Lectures/ "At this event professor Greene will discuss his new book as well as the importance of storytelling in science....The book has sold more than a million copies. Greene also authored, The Fabric of the Cosmos: Space, Time and the Texture of Reality, which spent 6 months on The New York Times bestsellers list and inspired The Washington Post to describe him as "the single best explainer of abstruse concepts in the world today." "The single best explainer" or "the single best creator"? Perhaps The Washington Post has made a mistake. Pentcho Valev |
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