From 7742b7cea4fab474371e11d7de877bcf00ebf3c0 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ulrich=20M=C3=BCller?= Date: Wed, 29 Nov 2023 10:24:06 +0100 Subject: [PATCH] Update Calc units table * lisp/calc/calc-units.el (math-standard-units): Update to 2018 CODATA adjustment. Use exact value for V0. Update some spellings, e.g. "Planck constant" instead of "Planck's constant". --- lisp/calc/calc-units.el | 93 ++++++++++++++++++++++------------------- 1 file changed, 49 insertions(+), 44 deletions(-) diff --git a/lisp/calc/calc-units.el b/lisp/calc/calc-units.el index f20e5801a01..2acc98ed384 100644 --- a/lisp/calc/calc-units.el +++ b/lisp/calc/calc-units.el @@ -43,12 +43,13 @@ ;;; Measures, by François Cardarelli) ;;; All conversions are exact unless otherwise noted. -;; CODATA values updated February 2016, using 2014 adjustment -;; https://arxiv.org/pdf/1507.07956.pdf - ;; Updated November 2018 for the redefinition of the SI ;; https://www.bipm.org/utils/en/pdf/CGPM/Draft-Resolution-A-EN.pdf +;; CODATA values last updated November 2023, using 2018 adjustment: +;; E. Tiesinga, P. J. Mohr, D. B. Newell, and B. N. Taylor, +;; Rev. Mod. Phys. 93, 025010 (2021) + (defvar math-standard-units '( ;; Length ( m nil "*Meter" ) @@ -122,7 +123,6 @@ ( mph "mi/hr" "*Miles per hour" ) ( kph "km/hr" "Kilometers per hour" ) ( knot "nmi/hr" "Knot" ) - ( c "299792458 m/s" "Speed of light" ) ;; SI definition ;; Acceleration ( ga "980665*10^(-5) m/s^2" "*\"g\" acceleration" nil @@ -143,8 +143,8 @@ "31.10347680 g") ;; ESUWM, 1/12 exact value for lbt ( ct "(2/10) g" "Carat" nil "0.2 g") ;; ESUWM - ( u "1.660539040*10^(-27) kg" "Unified atomic mass" nil - "1.660539040 10^-27 kg (*)");;(approx) CODATA + ( u "1.66053906660*10^(-27) kg" "Unified atomic mass" nil + "1.66053906660 10^-27 kg (*)") ;; (approx) CODATA ;; Force ( N "m kg/s^2" "*Newton" ) @@ -210,9 +210,6 @@ ( A nil "*Ampere" ) ( C "A s" "Coulomb" ) ( Fdy "ech Nav" "Faraday" ) - ( e "ech" "Elementary charge" ) - ( ech "1.602176634*10^(-19) C" "Elementary charge" nil - "1.602176634 10^-19 C") ;; SI definition ( V "W/A" "Volt" ) ( ohm "V/A" "Ohm" ) ( Ω "ohm" "Ohm" ) @@ -259,53 +256,61 @@ ;; Solid angle ( sr nil "*Steradian" ) + ;; Constants defining the International System of Units (SI) + ( c "299792458 m/s" "*Speed of light" ) + ( h "6.62607015*10^(-34) J s" "Planck constant" nil + "6.62607015 10^-34 J s") + ( ech "1.602176634*10^(-19) C" "Elementary charge" nil + "1.602176634 10^-19 C") + ( e "ech" "Elementary charge" nil + "1.602176634 10^-19 C") + ( k "1.380649*10^(-23) J/K" "Boltzmann constant" nil + "1.380649 10^-23 J/K") + ( Nav "6.02214076*10^(23) / mol" "Avogadro constant" nil + "6.02214076 10^23 / mol") + ;; Other physical quantities ;; Unless otherwise mentioned, the values are from CODATA, ;; and are approximate. - ( h "6.62607015*10^(-34) J s" "*Planck's constant" nil - "6.62607015 10^-34 J s") ;; SI definition - ( hbar "h / (2 pi)" "Planck's constant" ) ;; Exact + ( hbar "h / (2 pi)" "*Reduced Planck constant" ) ;; After the 2018 SI redefinition, eps0 and mu0 are measured quantities, ;; and mu0 no longer has the previous exact value of 4 pi 10^(-7) H/m. ( eps0 "ech^2 / (2 alpha h c)" "Permittivity of vacuum" ) ( ε0 "eps0" "Permittivity of vacuum" ) ( mu0 "1 / (eps0 c^2)" "Permeability of vacuum") ( μ0 "mu0" "Permeability of vacuum") - ( G "6.67408*10^(-11) m^3/(kg s^2)" "Gravitational constant" nil - "6.67408 10^-11 m^3/(kg s^2) (*)") - ( Nav "6.02214076*10^(23) / mol" "Avogadro's constant" nil - "6.02214076 10^23 / mol") ;; SI definition - ( me "9.10938356*10^(-31) kg" "Electron rest mass" nil - "9.10938356 10^-31 kg (*)") - ( mp "1.672621898*10^(-27) kg" "Proton rest mass" nil - "1.672621898 10^-27 kg (*)") - ( mn "1.674927471*10^(-27) kg" "Neutron rest mass" nil - "1.674927471 10^-27 kg (*)") - ( mmu "1.883531594*10^(-28) kg" "Muon rest mass" nil - "1.883531594 10^-28 kg (*)") + ( G "6.67430*10^(-11) m^3/(kg s^2)" "Gravitational constant" nil + "6.67430 10^-11 m^3/(kg s^2) (*)") + ( me "9.1093837015*10^(-31) kg" "Electron rest mass" nil + "9.1093837015 10^-31 kg (*)") + ( mp "1.67262192369*10^(-27) kg" "Proton rest mass" nil + "1.67262192369 10^-27 kg (*)") + ( mn "1.67492749804*10^(-27) kg" "Neutron rest mass" nil + "1.67492749804 10^-27 kg (*)") + ( mmu "1.883531627*10^(-28) kg" "Muon rest mass" nil + "1.883531627 10^-28 kg (*)") ( mμ "mmu" "Muon rest mass" nil - "1.883531594 10^-28 kg (*)") - ( Ryd "10973731.568508 /m" "Rydberg's constant" nil - "10973731.568508 /m (*)") - ( k "1.380649*10^(-23) J/K" "Boltzmann's constant" nil - "1.380649 10^-23 J/K") ;; SI definition + "1.883531627 10^-28 kg (*)") + ( Ryd "10973731.568160 /m" "Rydberg constant" nil + "10973731.568160 /m (*)") ( sigma "2 pi^5 k^4 / (15 h^3 c^2)" "Stefan-Boltzmann constant") ( σ "sigma" "Stefan-Boltzmann constant") - ( alpha "7.2973525664*10^(-3)" "Fine structure constant" nil - "7.2973525664 10^-3 (*)") - ( α "alpha" "Fine structure constant" nil - "7.2973525664 10^-3 (*)") - ( muB "927.4009994*10^(-26) J/T" "Bohr magneton" nil - "927.4009994 10^-26 J/T (*)") - ( muN "5.050783699*10^(-27) J/T" "Nuclear magneton" nil - "5.050783699 10^-27 J/T (*)") - ( mue "-928.4764620*10^(-26) J/T" "Electron magnetic moment" nil - "-928.4764620 10^-26 J/T (*)") - ( mup "1.4106067873*10^(-26) J/T" "Proton magnetic moment" nil - "1.4106067873 10^-26 J/T (*)") - ( R0 "Nav k" "Molar gas constant") ;; Exact - ( V0 "22.710947*10^(-3) m^3/mol" "Standard volume of ideal gas" nil - "22.710947 10^-3 m^3/mol (*)") + ( alpha "7.2973525693*10^(-3)" "Fine structure constant" nil + "7.2973525693 10^-3 (*)") + ( α "alpha" "Fine structure constant" nil + "7.2973525693 10^-3 (*)") + ( muB "9.2740100783*10^(-24) J/T" "Bohr magneton" nil + "9.2740100783 10^-24 J/T (*)") + ( muN "5.0507837461*10^(-27) J/T" "Nuclear magneton" nil + "5.0507837461 10^-27 J/T (*)") + ( mue "−9.2847647043*10^(-24) J/T" "Electron magnetic moment" nil + "-9.2847647043 10^-24 J/T (*)") + ( mup "1.41060679736*10^(-26) J/T" "Proton magnetic moment" nil + "1.41060679736 10^-26 J/T (*)") + ( R0 "Nav k" "Molar gas constant" ) + ( V0 "R0 273.15 K / 10^5 Pa" "Standard volume of ideal gas" ) + ;; IUPAC 1982 standard temperature and pressure + ;; Logarithmic units ( Np nil "*Neper") ( dB "(ln(10)/20) Np" "decibel")) -- 2.39.2