Re: 2nd law Re: Origine of Life

[Aiviet Nguyen <aiviet2@yahoo.com>]

Hi anh TP,

     Yeap. To^i ddo^`ng y' vo+'i anh ne^'u ta insist
ta co' the^? giu+~ ddi.nh lua^.t 2 cho qua' tri`nh
evolution cho toa`n vu~ tru.  Ca'i kho' la` trong
thu+.c te^' ta co' the^? la^.p mo^.t boundary cho
mo^.t he^. ddang xe't. Thi' du. khi hi`nh tha`nh ca'c
galaxy, anh tha^'y entropy gia?m. Ne^'u anh ye^u quy'
2nd law thi` anh co' the^? tu+. nhu? "O+? dda^y ddo'
the^' na`o cu~ng co' entropy ta(ng dde^? bu` la.i".
Ddie^`u na`y chi? co' y' nghi~agiu+~ cho tu+ duy cu?a
anh ddu+o+.c dde.p dde~ tho^i. Thu+.c ra anh chii?
quan sa't tha^'y mo^~i ca'i galaxy ddang hi`nh tha`nh
va` entropy gia?m.

   Co' mo^.t ca'ch practical ho+n: to^i kho^ng ba`n
to+'i toa`n vu~ tru. vi` to^i kho^ng bie6't gi` ve^`
no' ca?, vi` va^.y bie^'t ca'i "toa`n the^?" tru+```u
tu+o+.ng ddo' co' entropy ta(ng hay gia?m to^i kho^ng
quan ta^m. To^i xa^y du+.ng mo^.t ly' thuye^'t kho^ng
ca^n ba(`ng khi ddo' evolution cu?a he^. nga`y ca`ng
cha.y xa ddie^?m ca^n ba(`ng va` entropy gia?m. To^i
du`ng no' dde^? mo^ ta? qua' tri`nh ( ra^'t co' the^?
chi? la` partial cu?a mo^.t qua' tri`nh universal na`o
ddo') to^i ddang xe't va` co' ddu? phu+o+ng tie^.n
quan sa't.

   Vi` va^.y anh no'i kho^ng co' gi` ma^u thua^~n. Tuy
nhie^n ( ca'i na`y ho+i extravagant) to^i co' ca?m
gia'c ne^'u no'i entropy cu?a toa`n vu~ tru. kho^ng
ta(ng kho^ng gia?m , hay luo^n luo^n gia?m thi` cu~ng
kho^ng the^? falsify ddu+o+.c.

   Khi  to^i cho.n ca'c "ddi.nh lua^.t ddo'" thi`
second law chi? a'p du.ng cho ca'c qua' tri`nh ga^`n
ddie^?m ca^n ba(`ng ma` tho^i

--- tuan pham <tuan.pham@unsw.edu.au> wrote:
> 2nd law kho^ng he^` ca^'m local entropy gia?m, ma`
> chi? no'i la` TOTAL entropy of the universe always 
> increases. Khi a'p du.ng 2nd law ca^`n ddi.nh ro~ 
> boundaries cu?a system.

    Ne^'u cho toa`n the^? vu~ tru. la` mo^.t qua'
tri`nh kho^ng ca^n ba(`ng,
nhie^.t ddo^.ng kho^ng ca^n ba(`ng cu~ng kho^ng ca^'m 
local entropy ta(ng  :-)). Khi ddo' to^i cu~ng co'
the^? no'i gio^'ng anh: anh ca^`n ddi.nh ro~ boundary
cu?a system.
 
   Thu+.c ra mo.i va^'n dde^` tre^n ddo+`i na`y dde^`u
pha?i xa'c ddi.nh boundary mo+'i bie^'t mo^.t me^.nh
dde^` la` ddu'ng sai. Co' ddie^`u trong practice,
boundary ra^'t kho' ddi.nh vi` the^' ngu+o+`i ta
thu+o+`ng pho' ma(.c cho common sense  va`
pragmatism:-))

Cheers
Aiviet

=====

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