The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
Topics:
Values
Energy
Equivalents
Searchable
Bibliography
Background

Constants
Bibliography

Constants,
Units &
Uncertainty
home page
[skip navigation]
tau molar mass
 $M{\rm (\tau)},M_{\rm \tau}$
 Value  1.907 49 x 10-3 kg mol-1
 Standard uncertainty  0.000 17 x 10-3 kg mol-1
  Relative standard uncertainty   9.0 x 10-5
 Concise form  1.907 49(17) x 10-3 kg mol-1    
 
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

 
Go to a new search