A322415 Decimal expansion of h * Δν_{Cs} / c^2 in units of kg in the 2019 SI system of units.

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

Table of n, a(n) for n=-40..35.

BIPM, On the revision of the International System of Units (SI), Nov 13-16 2018.

Max Planck, Ueber irreversible Strahlungsvorgänge, Ann. Physik 1 (1900) 69-122. See paragraph 26. Natürliche Maasseinheiten. pp. 120-122; alternative link.

Wikipedia, 2019 redefinition of SI base units

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

Adjacent sequences: A322412 A322413 A322414 * A322416 A322417 A322418

Keyword

nonn,cons,easy

Author

Wolfdieter Lang, Feb 11 2019

Status

approved