Difference between revisions of "Dictionary:Birch’s law"

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Empirical relations between density <math> \rho </math> in g/cm<sup>3</sup>, P-wave velocity ''V'' in km/s, and mean atomic number ''m''.  
 
Empirical relations between density <math> \rho </math> in g/cm<sup>3</sup>, P-wave velocity ''V'' in km/s, and mean atomic number ''m''.  
 
For nonporous rocks,  
 
For nonporous rocks,  
  
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<center><math>\rho = a(m) = 3.05 V </math></center>
 
<center><math>\rho = a(m) = 3.05 V </math></center>
  
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where a(m)=137 for m=21. Alternatively:
 
where a(m)=137 for m=21. Alternatively:
  
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<center><math>V= A(m) \rho ^{1.5} </math> or <math>V=a\rho +b </math>,</center>
 
<center><math>V= A(m) \rho ^{1.5} </math> or <math>V=a\rho +b </math>,</center>
  
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where ''a, b'' are constants. Named for [[Special:MyLanguage/Albert F. Birch|Albert F. Birch]] (1903-1992), American geophysicist.
 
where ''a, b'' are constants. Named for [[Special:MyLanguage/Albert F. Birch|Albert F. Birch]] (1903-1992), American geophysicist.
  
  
==External links==
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==External links== <!--T:6-->
  
 
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Revision as of 23:06, 24 March 2017

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Empirical relations between density in g/cm3, P-wave velocity V in km/s, and mean atomic number m. For nonporous rocks,

where a(m)=137 for m=21. Alternatively:

or ,

where a, b are constants. Named for Albert F. Birch (1903-1992), American geophysicist.


External links

find literature about
Birch’s law
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