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Planck constant over 2 pi  Value  1.054 571 726 x 10-34 J s  Standard uncertainty  0.000 000 047 x 10-34 J s   Relative standard uncertainty   4.4 x 10-8  Concise form  1.054 571 726(47) x 10-34 J s       Click here for correlation coefficient of this constant with other constants Source: 2010 CODATA      recommended values  Definition of uncertainty       Correlation coefficient with any other constant