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A322415
Decimal expansion of h * Δν_{Cs} / c^2 in units of kg in the 2019 SI system of units.
16
6, 7, 7, 7, 2, 6, 5, 3, 1, 2, 3, 1, 2, 0, 6, 7, 6, 1, 0, 6, 1, 7, 2, 7, 0, 2, 3, 4, 6, 5, 8, 4, 3, 5, 5, 3, 9, 4, 4, 6, 4, 5, 5, 7, 0, 6, 2, 4, 2, 3, 2, 3, 9, 8, 0, 4, 2, 6, 6, 2, 2, 4, 5, 0, 7, 0, 9, 9, 8, 6, 1, 7, 6, 7, 8, 8
OFFSET
-40,1
COMMENTS
The seven defining constants of the SI system (May 20 2019) are (see the BIPM link):
Δν_{Cs} = Δν(133Cs)_{hfs} = 9192631770 s^(-1)
c = 299792458 m/s
h = 6.62607015*10^{-34} J s [kg m^2 s^(-1)]
e = 1.602176634*10^{-19} C [A s]
k = 1.380649*10^{-23} J/K [kg m^2 s^(-2) K^(-1)]
N_A = 6.02214076*10{23} mol^(-1)
K_{cd} = 683 lm/W [cd sr s^3 kg^(-1) m^(-2)]
In brackets are the units given in s, m, kg, A, K, and cd*sr. The symbol sr stands for steradian (or sterad).
K_{cd} is the luminous efficacy of monochromatic radiation of frequency 540*10^12 Hz, with Hz = 1/s.
The given combination of three constants defines the kg from the Planck constant h after s and m have been expressed in terms of Delta nu_{Cs} and c.
LINKS
Max Planck, Ueber irreversible Strahlungsvorgänge, Ann. Physik 1 (1900) 69-122. See paragraph 26. Natürliche Maasseinheiten. pp. 120-122; alternative link.
FORMULA
Equals 0.677726531231206761061727023465843553944645570624232398042662245... * 10^{-40} kg.
CROSSREFS
Cf. A230458 (Δν_{Cs}), A003678 (c) A003676 (h), A081823 (e), A070063 (k), A248510 (R_K), A248508 (K_{J}), A322579 (m), A322580 (kg), A324031 (A), A324032 (K), A324033 (lm), A324034 (J).
Sequence in context: A201753 A084256 A197692 * A023409 A349991 A351784
KEYWORD
nonn,cons,easy
AUTHOR
Wolfdieter Lang, Feb 11 2019
STATUS
approved