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%I #10 Aug 11 2022 14:48:43
%S 8,9,8,7,5,5,1,7,9
%N Decimal expansion of the Coulomb constant in SI units as defined after 20 May 2019.
%C Before the redefinition of the SI units this value is A182999 with offset 10. After redefinition the value of the Coulomb constant is (8987551792.3 +- 1.4) kg*m^3*s^(-4)*A^(-2).
%C The Coulomb constant k can be expressed in basic constants as k = (alpha * h * c)/(2*Pi * e^2), where alpha (A003673) is the fine-structure constant, h (A003676) is the Planck constant, c (A003678) is the speed of light, and e (A081823) is the elementary charge. The constants h, c, and e are defined to be exact, so the relative precision of the Coulomb constant is the same as that of the fine-structure constant.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Coulomb%27s_constant">Coulomb's constant</a>.
%F Equals (A003673 * A003676 * A003678)/(2*Pi * A081823^2).
%e Equals 8.98755179... * 10^9 kg*m^3*s^(-4)*A^(-2).
%Y Cf. A003673, A003676, A003678, A081823, A182999.
%K nonn,cons,more
%O 10,1
%A _Jianing Song_, Aug 11 2022