The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
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atomic unit of magnetizability
 $e^2a_0^2/m_{\rm e}$
 Value  7.891 036 5886 x 10-29 J T-2
 Standard uncertainty  0.000 000 0090 x 10-29 J T-2
  Relative standard uncertainty   1.1 x 10-9
 Concise form  7.891 036 5886(90) x 10-29 J T-2    
 
Click here for correlation coefficient of this constant with other constants
Source: 2014 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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