On Saturday, November 15, 2014 4:57:14 PM UTC, John Clark wrote: > > > > On Fri, Nov 14, 2014 at 5:23 PM, meekerdb <[email protected] > <javascript:>> wrote: > > > "The numbers of ways the system could have gotten to the way it is" >> isn't the usual formulation > > > If you want to say that Entropy is proportional to the number of > microstates that produce the same macrostate then it's also proportional to > the number of precursor states. > > > and I think it's ambiguous. In general there are arbitrarily many >> possible histories and different possible starting points. >> > > Unless you're talking about hypothetical new physics there are not > arbitrarily many previous states that could have produced the present > state, just a astronomical number. > > > Boltzmann's formulation was the logarithm of the numbers of possible >> states consistent with constraints defining the system, e.g. its total >> kinetic energy >> > > Entropy is inversely proportional to work not kinetic energy. A box of gas > may have a lot of kinetic energy because all the atoms in it are moving > around at high speed, but they're all moving in different directions, > Entropy is a measure of how well all that activity can be translated into > moving something in just one direction (work). The higher the Entropy the > less work you can get out of it with the same heat sink > > > In the case of a BH the constraints are its classical defining >> parameters: mass, angular momentum, and electric charge. >> > > Yes, a Black Hole is the simplest macroscopic thing in the universe, just > 3 numbers tells you all there is to know about a particular one; but there > are a gargantuan number of ways that Black Hole could have formed, perhaps > it was made by putting a lot of sand together in one place, or > encyclopedias or too many puppy dogs, it doesn't matter. And that's why > Black Holes have such a enormous Entropy. >
Would you help me to understand this? It's just that I'm seeing the number of ways a black hole could have formed as a non-physical conception that depends ....some kind of information deficit across the event horizon. Like, if I have special information...like maybe a theory....that eliminates 50 percent of the ways a specific black hole could have formed, by some process of elimination. The entropy should now physically read half what it did to start with. John K Clark > > > > > > > > > > > > > Classically there is no finer grained description, so that's what seems > to make BH entropy more fundamental that the usual thermodynamic system. > >> >> Brent >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Everything List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at http://groups.google.com/group/everything-list. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
