Hi Stephen P. King  

It's an imperfect world.

Initial perfection results from assuming the initial 
crystal entropy to be zero. But in reality there is 
always an entropy from misfitting planes (dislocations) 
and there is a thermal equilibrium concentration of 
vacancies. And impurities cause stresses.
And multiple phases, and cracks caused by thermal
distributions, etc. etc. etc.

I spent a career at NIST studying the resulting
effects on strength.

lowing content -----  
From: Stephen P. King  
Receiver: everything-list  
Time: 2012-11-09, 13:43:11 
Subject: Re: Communicability 


On 11/9/2012 11:36 AM, Roger Clough wrote: 
> Hi Stephen P. King 
> 
> I fall back on my experiment with crackers. 
> Nothing stays perfect if allowed to be free and 
> time passes. 

Hi Roger, 

     My problem is the assumption of an initial perfection. It is never  
explained! 

> 
> Boltzmann's theorem S = k ln(W) quantifies that, 
> it emerges from statistical mechanics. 
> 
> A more thorough explanation is given on: 
> 
> http://plato.stanford.edu/entries/statphys-Boltzmann/ 
> 
     A very good article! Attention should be paid to this section:  
http://plato.stanford.edu/entries/statphys-Boltzmann/#4.1 

--  
Onward! 

Stephen 


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