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Originally Posted by joelr But that would mean we knew what time is and time is the biggest mystery ever.
If you entered a universe at maximum entropy you could still build a clock and it would work. So you could still measure time. Or your physical body would still be aging. At equilibrium nothing special happens, entropy can decrease and systems can become more ordered, there can exist some probability that they could return to their original state. |
Building a clock in a maximum entropy universe would entail that the universe is no longer at maximum entropy... Maximum entropy would be a soup of average particles.
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But time is something different. The neutral kayon violates T symmetry, unlike all other subatomic entities which have a symmetry that exists forward or backward in time. This is an example of a measurement of time besides entropy.
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That is quite possible. However, I'm of the opinion that such behaviors may also be considered steady-state, or independent of time.
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With the Lorentz transformations points in space-time can be measured and time is of course one of the vectors.
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The only issue is, time is a restricted dimension in the sense that there is essentially no choice in the way of how things travel along it, unlike the spatial dimensions, or the intensity of a color as some may like to use in 2D projections.