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A comment on What Is Time?.

Re:What Is Time? by FesterCluck on Saturday August 23, 2014 @04:43AM (#8215333)
This article does an amazing job of describing the various versions of the definition of "time" used in physics. The author limits his use of jargon, but defines them well when necessary. Highly recommended.
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Re:What Is Time? by iaw on Saturday August 23, 2014 @04:57PM (#8216849)
I wonder if the statement about Newton's second law (there exists an r(-t)) holds true when you include relativistic effects.
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Re:What Is Time? by calhoun137 on Saturday August 23, 2014 @05:16PM (#8216891)
Time is reversible in general relativity, in the sense that if you replace t by -t everywhere the solution is still valid. I don't remember the full proof off the top of my head, and the argument I do remember is complicated.
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Re:What Is Time? by pentabular on Saturday August 23, 2014 @07:25PM (#8217169)
no such thing as backwards time travel, sorry!
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Re:What Is Time? by drdeca on Saturday August 23, 2014 @08:06PM (#8217237)
Can you clarify? I don't know what you mean.
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Re:What Is Time? by iscrewyou on Saturday August 23, 2014 @08:03PM (#8217233)
Oh, Ok!
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