Arrow of Time - Sixty Symbols
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Sean Carroll on the arrow of time. See all our videos with Sean: http://bit.ly/115AVqa Sean's book about the arrow of time: http://amzn.to/1hCYrPr Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://www.nottingham.ac.uk/physics/index.aspx Sixty Symbols videos by Brady Haran A run-down of Brady's channels: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html
Comments
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And what about relativity
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Its weird to say that the things that ancient philosophers assumed to be true are still true despite all the information we have now that suggests otherwise. And by the way there were a handful of ancient philosophers who did wonder about the nature of time.
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Aristotle also didnt have to worry about how people are getting sick because its obvious that being sick is just symptom of having to much of the fire element inside of you
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Sheldon cooper does not agree
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there is no arrow of time, there is only memory.
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"goes up and and down".. funny face realizing that his hand went in the other order.. "I should say down and up" LOL
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If you had a plant seed and perfect information about all of its internals as a seed, as well as perfect knowledge of the Earth's atmosphere and distance from the sun, could you draw a picture of the plant 5 years from now?
I know it seems unrelated but I think a lot of physicists and biologists involved in talking to each other about this particular topic might find it interesting to ponder. -
What is clocks?
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I left a glass of water on my bedside table last night and when i woke up there was ice cubes in it. Forgot to say I went to sleep outside at the south pole...
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He reminds me of James Woods. Wish I had a physics professor like him at university...
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The arrow of time sounds like something you'd find in a treasure chest in a Zelda game
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Time seems to be as physical as it does metaphysical..
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Prof. James Woods
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Time is what keeps everything from happening at once.
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2:40-2:50 this is absolute rubbish, due to loss of energy. Going back in time requires to put back in the energy in the entire universe to restore the entire universe as it was a moment ago. The earths rotation around the sun dissipates enormous amounts of energy due to tidal forces alone. This energy is lost for ever due to heat dissipation and it is impossible to reverse the film back without putting back all the dissipated energy into it. so this guy talks rubbish. Thing is the earth sun system has a (percentage wise) little less energy then it had a second before, now percentage wise it may be a los of a small mount but in absolute terms it is HUGE.... so this guy talks absolute rubbish.
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But there is a more fundamental aspect of this dilema: even in the pendulum example, at any given time it has an specific velocity that 'will make it go' to one side or the other; the pendulum doesn't change its moving direction spontanously, in other words time can't turn around (for example), it has some kind of direction even when the formula is simetric, if that weren't the case, then it would be imossible to predict the pendulum position at any time t. How can this be explained? The only possible answer that comes to my mind is that all the pendulums at different times "exists all at once", are 'the laws of the universe' descriptions of 4D shapes?
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Just like biological theories of evolution and genetic codons and other possibilities the cosmos can have such possibilities of codons cosmos evolutionary cosmos reproduction and others. It is just possibilities but going and searching for these is a difficult task.
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Excuse me, but I remember what happens tomorrow p.o
I uh... eat cereal.
And do stuff... Yes. -
he sounds like his nose is mega clogged with coke
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