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Add several physical constants #396

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Add several physical constants #396

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42 changes: 42 additions & 0 deletions core/src/units/builtin.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -250,6 +250,48 @@ const CONSTANTS: &[UnitTuple] = &[
),
("gravity", "", "=9.80665 m/s^2", ""),
("force", "", "gravity", ""), // used to convert some units
(
"stefan_boltzmann",
"",
"=2*pi^5*boltzmann^4/15/c^2/planck^3",
"Stefan-Boltzmann constant (exact)",
),
(
"gas_constant",
"",
"=avogadro*boltzmann",
"molar gas constant (exact)",
),
(
"vacuum_permittivity",
"",
"=8.8541878188e-12 farad/m",
"Vacuum dielectric permittivity",
),
(
"reduced_planck",
"",
"=planck/2/pi",
"reduced Planck constant (exact)",
),
(
"elementary_charge",
"",
"=1.602176634e-19 coulomb",
"magnitude of the charge of an electron (exact)",
),
(
"faraday",
"",
"=elementary_charge*avogadro",
"Faraday constant (exact)",
),
(
"vacuum_permeability",
"",
"=1.25663706127e-6 N/A^2",
"Vacuum magnetic permeability",
),
];

const ANGLES: &[UnitTuple] = &[
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