consts #
Constants
This module provides a collection of physical constants in the MKSA system.
The constants are defined in the module files themselves, and are not imported by default.
Usage
import vsl.consts
println(consts.mksa_speed_of_light)Fundamental Constants
consts.mksa_speed_of_lightThe speed of light in vacuum.
consts.mksa_vacuum_permeabilityThe permeability of free space, μ_0. This constant is defined in the MKSA system only.
consts.mksa_vacuum_permittivityThe permittivity of free space, \epsilon_0. This constant is defined in the MKSA system only.
consts.mksa_plancks_constant_hPlanck's constant, h.
consts.mksa_plancks_constant_hbarPlanck's constant divided by 2\pi, \hbar.
consts.mksa_planck_temperaturePlanck temperature T_p.
consts.num_avogadroAvogadro's number, N_a.
consts.mksa_faradayThe molar charge of 1 Faraday.
consts.mksa_boltzmannThe Boltzmann constant, k.
consts.mksa_molar_gasThe molar gas constant, R_0.
consts.mksa_standard_gas_volumeThe standard gas volume, V_0.
consts.mksa_stefan_boltzmann_constantThe Stefan-Boltzmann radiation constant, \sigma.
consts.mksa_gaussThe magnetic field of 1 Gauss.
Astronomy and Astrophysics
consts.mksa_astronomical_unitThe length of 1 astronomical unit (mean earth-sun distance), au.
consts.mksa_gravitational_constantThe gravitational constant, G.
consts.mksa_light_yearThe distance of 1 light-year, ly.
consts.mksa_parsecThe distance of 1 parsec, pc.
consts.mksa_grav_accelThe standard gravitational acceleration on Earth, g.
consts.mksa_solar_massThe mass of the Sun.
Atomic and Nuclear Physics
consts.mksa_electron_chargeThe charge of the electron, e.
consts.mksa_electron_voltThe energy of 1 electron volt, eV.
consts.mksa_unified_atomic_massThe unified atomic mass, amu.
consts.mksa_mass_electronThe mass of the electron, m_e.
consts.mksa_mass_muonThe mass of the muon, m_μ.
consts.mksa_mass_protonThe mass of the proton, m_p.
consts.mksa_mass_neutronThe mass of the neutron, m_n.
consts.num_fine_structureThe electromagnetic fine structure constant \alpha.
consts.mksa_rydbergThe Rydberg constant, Ry, in units of energy. This is related to the Rydberg inverse wavelength R_\infty by Ry = h c R_\infty.
consts.mksa_bohr_radiusThe Bohr radius, a_0.
consts.mksa_angstromThe length of 1 angstrom.
consts.mksa_barnThe area of 1 barn.
consts.mksa_bohr_magnetonThe Bohr Magneton, μ_B.
consts.mksa_nuclear_magnetonThe Nuclear Magneton, μ_N.
consts.mksa_electron_magnetic_momentThe absolute value of the magnetic moment of the electron, μ_e. The physical magnetic moment of the electron is negative.
consts.mksa_proton_magnetic_momentThe magnetic moment of the proton, μ_p.
consts.mksa_thomson_cross_sectionThe Thomson cross section, \sigma_T.
consts.mksa_debyeThe electric dipole moment of 1 Debye, D.
Measurement of Time
consts.mksa_minuteThe number of seconds in 1 minute.
consts.mksa_hourThe number of seconds in 1 hour.
consts.mksa_dayThe number of seconds in 1 day.
consts.mksa_weekThe number of seconds in 1 week.
Imperial Units
consts.mksa_inchThe length of 1 inch.
consts.mksa_footThe length of 1 foot.
consts.mksa_yardThe length of 1 yard.
consts.mksa_mileThe length of 1 mile.
consts.mksa_milThe length of 1 mil (1/1000th of an inch).
Speed and Nautical Units
consts.mksa_kilometers_per_hourThe speed of 1 kilometer per hour.
consts.mksa_miles_per_hourThe speed of 1 mile per hour.
consts.mksa_nautical_mileThe length of 1 nautical mile.
consts.mksa_fathomThe length of 1 fathom.
consts.mksa_knotThe speed of 1 knot.
Printers Units
consts.mksa_pointThe length of 1 printer's point (1/72 inch).
consts.mksa_texpointThe length of 1 TeX point (1/72.27 inch).
Volume, Area and Length
consts.mksa_micronThe length of 1 micron.
consts.mksa_hectareThe area of 1 hectare.
consts.mksa_acreThe area of 1 acre.
consts.mksa_literThe volume of 1 liter.
consts.mksa_us_gallonThe volume of 1 US gallon.
consts.mksa_canadian_gallonThe volume of 1 Canadian gallon.
consts.mksa_uk_gallonThe volume of 1 UK gallon.
consts.mksa_quartThe volume of 1 quart.
consts.mksa_pintThe volume of 1 pint.
Mass and Weight
consts.mksa_pound_massThe mass of 1 pound.
consts.mksa_ounce_massThe mass of 1 ounce.
consts.mksa_tonThe mass of 1 ton.
consts.mksa_metric_tonThe mass of 1 metric ton (1000 kg).
consts.mksa_uk_tonThe mass of 1 UK ton.
consts.mksa_troy_ounceThe mass of 1 troy ounce.
consts.mksa_caratThe mass of 1 carat.
consts.mksa_gram_forceThe force of 1 gram weight.
consts.mksa_pound_forceThe force of 1 pound weight.
consts.mksa_kilopound_forceThe force of 1 kilopound weight.
consts.mksa_poundalThe force of 1 poundal.
Thermal Energy and Power
consts.mksa_calorieThe energy of 1 calorie.
consts.mksa_btuThe energy of 1 British Thermal Unit, btu.
consts.mksa_thermThe energy of 1 Therm.
consts.mksa_horsepowerThe power of 1 horsepower.
Pressure
consts.mksa_barThe pressure of 1 bar.
consts.mksa_std_atmosphereThe pressure of 1 standard atmosphere.
consts.mksa_torrThe pressure of 1 torr.
consts.mksa_meter_of_mercuryThe pressure of 1 meter of mercury.
consts.mksa_inch_of_mercuryThe pressure of 1 inch of mercury.
consts.mksa_inch_of_waterThe pressure of 1 inch of water.
consts.mksa_psiThe pressure of 1 pound per square inch.
Viscosity
consts.mksa_poiseThe dynamic viscosity of 1 poise.
consts.mksa_stokesThe kinematic viscosity of 1 stokes.
Light and Illumination
consts.mksa_stilbThe luminance of 1 stilb.
consts.mksa_lumenThe luminous flux of 1 lumen.
consts.mksa_luxThe illuminance of 1 lux.
consts.mksa_photThe illuminance of 1 phot.
consts.mksa_footcandleThe illuminance of 1 footcandle.
consts.mksa_lambertThe luminance of 1 lambert.
consts.mksa_footlambertThe luminance of 1 footlambert.
Radioactivity
consts.mksa_curieThe activity of 1 curie.
consts.mksa_roentgenThe exposure of 1 roentgen.
consts.mksa_radThe absorbed dose of 1 rad.
Force and Energy
consts.mksa_newtonThe SI unit of force, 1 Newton.
consts.mksa_dyneThe force of 1 Dyne = 10^{-5} Newton.
consts.mksa_jouleThe SI unit of energy, 1 Joule.
consts.mksa_ergThe energy 1 erg = 10^{-7} Joule.
Prefixes
These constants are dimensionless scaling factors.
consts.num_yotta10^{24}
consts.num_zetta10^{21}
consts.num_exa10^{18}
consts.num_peta10^{15}
consts.num_tera10^{12}
consts.num_giga10^9
consts.num_mega10^6
consts.num_kilo10^3
consts.num_milli10^{-3}
consts.num_micro10^{-6}
consts.num_vsl_nano10^{-9}
consts.num_pico10^{-12}
consts.num_femto10^{-15}
consts.num_atto10^{-18}
consts.num_zepto10^{-21}
consts.num_yocto10^{-24}
Examples
The following program demonstrates the use of the physical constants in a calculation. In this case, the goal is to calculate the range of light-travel times from Earth to Mars.
The required data is the average distance of each planet from the Sun in astronomical units (the eccentricities and inclinations of the orbits will be neglected for the purposes of this calculation). The average radius of the orbit of Mars is 1.52 astronomical units, and for the orbit of Earth it is 1 astronomical unit (by definition). These values are combined with the MKSA values of the constants for the speed of light and the length of an astronomical unit to produce a result for the shortest and longest light-travel times in seconds. The figures are converted into minutes before being displayed.
module main
import vsl.consts
c := consts.mksa_speed_of_light
au := consts.mksa_astronomical_unit
minutes := consts.mksa_minute // distance stored in meters
r_earth := 1.0 * au
r_mars := 1.52 * au
t_min := (r_mars - r_earth) / c
t_max := (r_mars + r_earth) / c
min := t_min / minutes
max := t_max / minutes
println('light travel time from Earth to Mars:')
println('minimum = ${min} minutes')
println('maximum = ${max} minutes')will print
light travel time from Earth to Mars:
minimum = 4.3 minutes
maximum = 21.0 minutesReferences and Further Reading
The authoritative sources for physical constants are the 2006 CODATA recommended values, published in the article below. Further information on the values of physical constants is also available from the NIST website.
- P.J. Mohr, B.N. Taylor, D.B. Newell, "CODATA Recommended Values of the Fundamental Physical Constants: 2006", Reviews of Modern Physics, 80(2), pp. 633--730 (2008).
Constants #
const cgs_speed_of_light = 2.99792458e+10 // cm / s
cgs_speed_of_light is a public constant used by this module.
const cgs_gravitational_constant = 6.673e-8 // cm^3 / g s^2
cgs_gravitational_constant is a public constant used by this module.
const cgs_plancks_constant_h = 6.62606896e-27 // g cm^2 / s
cgs_plancks_constant_h is a public constant used by this module.
const cgs_plancks_constant_hbar = 1.05457162825e-27 // g cm^2 / s
cgs_plancks_constant_hbar is a public constant used by this module.
const cgs_planck_temperature = 1.416785e+32 // Kelvin
cgs_planck_temperature is a public constant used by this module.
const cgs_astronomical_unit = 1.49597870691e+13 // cm
cgs_astronomical_unit is a public constant used by this module.
const cgs_light_year = 9.46053620707e+17 // cm
cgs_light_year is a public constant used by this module.
const cgs_parsec = 3.08567758135e+18 // cm
cgs_parsec is a public constant used by this module.
const cgs_grav_accel = 9.80665e+2 // cm / s^2
cgs_grav_accel is a public constant used by this module.
const cgs_electron_volt = 1.602176487e-12 // g cm^2 / s^2
cgs_electron_volt is a public constant used by this module.
const cgs_mass_electron = 9.10938188e-28 // g
cgs_mass_electron is a public constant used by this module.
const cgs_mass_muon = 1.88353109e-25 // g
cgs_mass_muon is a public constant used by this module.
const cgs_mass_proton = 1.67262158e-24 // g
cgs_mass_proton is a public constant used by this module.
const cgs_mass_neutron = 1.67492716e-24 // g
cgs_mass_neutron is a public constant used by this module.
const cgs_rydberg = 2.17987196968e-11 // g cm^2 / s^2
cgs_rydberg is a public constant used by this module.
const cgs_boltzmann = 1.3806504e-16 // g cm^2 / k s^2
cgs_boltzmann is a public constant used by this module.
const cgs_molar_gas = 8.314472e+7 // g cm^2 / k mol s^2
cgs_molar_gas is a public constant used by this module.
const cgs_standard_gas_volume = 2.2710981e+4 // cm^3 / mol
cgs_standard_gas_volume is a public constant used by this module.
const cgs_minute = 6e+1 // s
cgs_minute is a public constant used by this module.
const cgs_hour = 3.6e+3 // s
cgs_hour is a public constant used by this module.
const cgs_day = 8.64e+4 // s
cgs_day is a public constant used by this module.
const cgs_week = 6.048e+5 // s
cgs_week is a public constant used by this module.
const cgs_inch = 2.54e+0 // cm
cgs_inch is a public constant used by this module.
const cgs_foot = 3.048e+1 // cm
cgs_foot is a public constant used by this module.
const cgs_yard = 9.144e+1 // cm
cgs_yard is a public constant used by this module.
const cgs_mile = 1.609344e+5 // cm
cgs_mile is a public constant used by this module.
const cgs_nautical_mile = 1.852e+5 // cm
cgs_nautical_mile is a public constant used by this module.
const cgs_fathom = 1.8288e+2 // cm
cgs_fathom is a public constant used by this module.
const cgs_mil = 2.54e-3 // cm
cgs_mil is a public constant used by this module.
const cgs_point = 3.52777777778e-2 // cm
cgs_point is a public constant used by this module.
const cgs_texpoint = 3.51459803515e-2 // cm
cgs_texpoint is a public constant used by this module.
const cgs_micron = 1e-4 // cm
cgs_micron is a public constant used by this module.
const cgs_angstrom = 1e-8 // cm
cgs_angstrom is a public constant used by this module.
const cgs_hectare = 1e+8 // cm^2
cgs_hectare is a public constant used by this module.
const cgs_acre = 4.04685642241e+7 // cm^2
cgs_acre is a public constant used by this module.
const cgs_barn = 1e-24 // cm^2
cgs_barn is a public constant used by this module.
const cgs_liter = 1e+3 // cm^3
cgs_liter is a public constant used by this module.
const cgs_us_gallon = 3.78541178402e+3 // cm^3
cgs_us_gallon is a public constant used by this module.
const cgs_quart = 9.46352946004e+2 // cm^3
cgs_quart is a public constant used by this module.
const cgs_pint = 4.73176473002e+2 // cm^3
cgs_pint is a public constant used by this module.
const cgs_cup = 2.36588236501e+2 // cm^3
cgs_cup is a public constant used by this module.
const cgs_fluid_ounce = 2.95735295626e+1 // cm^3
cgs_fluid_ounce is a public constant used by this module.
const cgs_tablespoon = 1.47867647813e+1 // cm^3
cgs_tablespoon is a public constant used by this module.
const cgs_teaspoon = 4.92892159375e+0 // cm^3
cgs_teaspoon is a public constant used by this module.
const cgs_canadian_gallon = 4.54609e+3 // cm^3
cgs_canadian_gallon is a public constant used by this module.
const cgs_uk_gallon = 4.546092e+3 // cm^3
cgs_uk_gallon is a public constant used by this module.
const cgs_miles_per_hour = 4.4704e+1 // cm / s
cgs_miles_per_hour is a public constant used by this module.
const cgs_kilometers_per_hour = 2.77777777778e+1 // cm / s
cgs_kilometers_per_hour is a public constant used by this module.
const cgs_knot = 5.14444444444e+1 // cm / s
cgs_knot is a public constant used by this module.
const cgs_pound_mass = 4.5359237e+2 // g
cgs_pound_mass is a public constant used by this module.
const cgs_ounce_mass = 2.8349523125e+1 // g
cgs_ounce_mass is a public constant used by this module.
const cgs_ton = 9.0718474e+5 // g
cgs_ton is a public constant used by this module.
const cgs_metric_ton = 1e+6 // g
cgs_metric_ton is a public constant used by this module.
const cgs_uk_ton = 1.0160469088e+6 // g
cgs_uk_ton is a public constant used by this module.
const cgs_troy_ounce = 3.1103475e+1 // g
cgs_troy_ounce is a public constant used by this module.
const cgs_carat = 2e-1 // g
cgs_carat is a public constant used by this module.
const cgs_unified_atomic_mass = 1.660538782e-24 // g
cgs_unified_atomic_mass is a public constant used by this module.
const cgs_gram_force = 9.80665e+2 // cm g / s^2
cgs_gram_force is a public constant used by this module.
const cgs_pound_force = 4.44822161526e+5 // cm g / s^2
cgs_pound_force is a public constant used by this module.
const cgs_kilopound_force = 4.44822161526e+8 // cm g / s^2
cgs_kilopound_force is a public constant used by this module.
const cgs_poundal = 1.38255e+4 // cm g / s^2
cgs_poundal is a public constant used by this module.
const cgs_calorie = 4.1868e+7 // g cm^2 / s^2
cgs_calorie is a public constant used by this module.
const cgs_btu = 1.05505585262e+10 // g cm^2 / s^2
cgs_btu is a public constant used by this module.
const cgs_therm = 1.05506e+15 // g cm^2 / s^2
cgs_therm is a public constant used by this module.
const cgs_horsepower = 7.457e+9 // g cm^2 / s^3
cgs_horsepower is a public constant used by this module.
const cgs_bar = 1e+6 // g / cm s^2
cgs_bar is a public constant used by this module.
const cgs_std_atmosphere = 1.01325e+6 // g / cm s^2
cgs_std_atmosphere is a public constant used by this module.
const cgs_torr = 1.33322368421e+3 // g / cm s^2
cgs_torr is a public constant used by this module.
const cgs_meter_of_mercury = 1.33322368421e+6 // g / cm s^2
cgs_meter_of_mercury is a public constant used by this module.
const cgs_inch_of_mercury = 3.38638815789e+4 // g / cm s^2
cgs_inch_of_mercury is a public constant used by this module.
const cgs_inch_of_water = 2.490889e+3 // g / cm s^2
cgs_inch_of_water is a public constant used by this module.
const cgs_psi = 6.89475729317e+4 // g / cm s^2
cgs_psi is a public constant used by this module.
const cgs_poise = 1e+0 // g / cm s
cgs_poise is a public constant used by this module.
const cgs_stokes = 1e+0 // cm^2 / s
cgs_stokes is a public constant used by this module.
const cgs_stilb = 1e+0 // cd / cm^2
cgs_stilb is a public constant used by this module.
const cgs_lumen = 1e+0 // cd sr
cgs_lumen is a public constant used by this module.
const cgs_lux = 1e-4 // cd sr / cm^2
cgs_lux is a public constant used by this module.
const cgs_phot = 1e+0 // cd sr / cm^2
cgs_phot is a public constant used by this module.
const cgs_footcandle = 1.076e-3 // cd sr / cm^2
cgs_footcandle is a public constant used by this module.
const cgs_lambert = 1e+0 // cd sr / cm^2
cgs_lambert is a public constant used by this module.
const cgs_footlambert = 1.07639104e-3 // cd sr / cm^2
cgs_footlambert is a public constant used by this module.
const cgs_curie = 3.7e+10 // 1 / s
cgs_curie is a public constant used by this module.
const cgs_roentgen = 2.58e-7 // a s / g
cgs_roentgen is a public constant used by this module.
const cgs_rad = 1e+2 // cm^2 / s^2
cgs_rad is a public constant used by this module.
const cgs_solar_mass = 1.98892e+33 // g
cgs_solar_mass is a public constant used by this module.
const cgs_bohr_radius = 5.291772083e-9 // cm
cgs_bohr_radius is a public constant used by this module.
const cgs_newton = 1e+5 // cm g / s^2
cgs_newton is a public constant used by this module.
const cgs_dyne = 1e+0 // cm g / s^2
cgs_dyne is a public constant used by this module.
const cgs_joule = 1e+7 // g cm^2 / s^2
cgs_joule is a public constant used by this module.
const cgs_erg = 1e+0 // g cm^2 / s^2
cgs_erg is a public constant used by this module.
const cgs_stefan_boltzmann_constant = 5.67040047374e-5 // g / k^4 s^3
cgs_stefan_boltzmann_constant is a public constant used by this module.
const cgs_thomson_cross_section = 6.65245893699e-25 // cm^2
cgs_thomson_cross_section is a public constant used by this module.
const cgsm_speed_of_light = 2.99792458e+10 // cm / s
cgsm_speed_of_light is a public constant used by this module.
const cgsm_gravitational_constant = 6.673e-8 // cm^3 / g s^2
cgsm_gravitational_constant is a public constant used by this module.
const cgsm_plancks_constant_h = 6.62606896e-27 // g cm^2 / s
cgsm_plancks_constant_h is a public constant used by this module.
const cgsm_plancks_constant_hbar = 1.05457162825e-27 // g cm^2 / s
cgsm_plancks_constant_hbar is a public constant used by this module.
const cgsm_planck_temperature = 1.416785e+32 // Kelvin
cgsm_planck_temperature is a public constant used by this module.
const cgsm_astronomical_unit = 1.49597870691e+13 // cm
cgsm_astronomical_unit is a public constant used by this module.
const cgsm_light_year = 9.46053620707e+17 // cm
cgsm_light_year is a public constant used by this module.
const cgsm_parsec = 3.08567758135e+18 // cm
cgsm_parsec is a public constant used by this module.
const cgsm_grav_accel = 9.80665e+2 // cm / s^2
cgsm_grav_accel is a public constant used by this module.
const cgsm_electron_volt = 1.602176487e-12 // g cm^2 / s^2
cgsm_electron_volt is a public constant used by this module.
const cgsm_mass_electron = 9.10938188e-28 // g
cgsm_mass_electron is a public constant used by this module.
const cgsm_mass_muon = 1.88353109e-25 // g
cgsm_mass_muon is a public constant used by this module.
const cgsm_mass_proton = 1.67262158e-24 // g
cgsm_mass_proton is a public constant used by this module.
const cgsm_mass_neutron = 1.67492716e-24 // g
cgsm_mass_neutron is a public constant used by this module.
const cgsm_rydberg = 2.17987196968e-11 // g cm^2 / s^2
cgsm_rydberg is a public constant used by this module.
const cgsm_boltzmann = 1.3806504e-16 // g cm^2 / k s^2
cgsm_boltzmann is a public constant used by this module.
const cgsm_molar_gas = 8.314472e+7 // g cm^2 / k mol s^2
cgsm_molar_gas is a public constant used by this module.
const cgsm_standard_gas_volume = 2.2710981e+4 // cm^3 / mol
cgsm_standard_gas_volume is a public constant used by this module.
const cgsm_minute = 6e+1 // s
cgsm_minute is a public constant used by this module.
const cgsm_hour = 3.6e+3 // s
cgsm_hour is a public constant used by this module.
const cgsm_day = 8.64e+4 // s
cgsm_day is a public constant used by this module.
const cgsm_week = 6.048e+5 // s
cgsm_week is a public constant used by this module.
const cgsm_inch = 2.54e+0 // cm
cgsm_inch is a public constant used by this module.
const cgsm_foot = 3.048e+1 // cm
cgsm_foot is a public constant used by this module.
const cgsm_yard = 9.144e+1 // cm
cgsm_yard is a public constant used by this module.
const cgsm_mile = 1.609344e+5 // cm
cgsm_mile is a public constant used by this module.
const cgsm_nautical_mile = 1.852e+5 // cm
cgsm_nautical_mile is a public constant used by this module.
const cgsm_fathom = 1.8288e+2 // cm
cgsm_fathom is a public constant used by this module.
const cgsm_mil = 2.54e-3 // cm
cgsm_mil is a public constant used by this module.
const cgsm_point = 3.52777777778e-2 // cm
cgsm_point is a public constant used by this module.
const cgsm_texpoint = 3.51459803515e-2 // cm
cgsm_texpoint is a public constant used by this module.
const cgsm_micron = 1e-4 // cm
cgsm_micron is a public constant used by this module.
const cgsm_angstrom = 1e-8 // cm
cgsm_angstrom is a public constant used by this module.
const cgsm_hectare = 1e+8 // cm^2
cgsm_hectare is a public constant used by this module.
const cgsm_acre = 4.04685642241e+7 // cm^2
cgsm_acre is a public constant used by this module.
const cgsm_barn = 1e-24 // cm^2
cgsm_barn is a public constant used by this module.
const cgsm_liter = 1e+3 // cm^3
cgsm_liter is a public constant used by this module.
const cgsm_us_gallon = 3.78541178402e+3 // cm^3
cgsm_us_gallon is a public constant used by this module.
const cgsm_quart = 9.46352946004e+2 // cm^3
cgsm_quart is a public constant used by this module.
const cgsm_pint = 4.73176473002e+2 // cm^3
cgsm_pint is a public constant used by this module.
const cgsm_cup = 2.36588236501e+2 // cm^3
cgsm_cup is a public constant used by this module.
const cgsm_fluid_ounce = 2.95735295626e+1 // cm^3
cgsm_fluid_ounce is a public constant used by this module.
const cgsm_tablespoon = 1.47867647813e+1 // cm^3
cgsm_tablespoon is a public constant used by this module.
const cgsm_teaspoon = 4.92892159375e+0 // cm^3
cgsm_teaspoon is a public constant used by this module.
const cgsm_canadian_gallon = 4.54609e+3 // cm^3
cgsm_canadian_gallon is a public constant used by this module.
const cgsm_uk_gallon = 4.546092e+3 // cm^3
cgsm_uk_gallon is a public constant used by this module.
const cgsm_miles_per_hour = 4.4704e+1 // cm / s
cgsm_miles_per_hour is a public constant used by this module.
const cgsm_kilometers_per_hour = 2.77777777778e+1 // cm / s
cgsm_kilometers_per_hour is a public constant used by this module.
const cgsm_knot = 5.14444444444e+1 // cm / s
cgsm_knot is a public constant used by this module.
const cgsm_pound_mass = 4.5359237e+2 // g
cgsm_pound_mass is a public constant used by this module.
const cgsm_ounce_mass = 2.8349523125e+1 // g
cgsm_ounce_mass is a public constant used by this module.
const cgsm_ton = 9.0718474e+5 // g
cgsm_ton is a public constant used by this module.
const cgsm_metric_ton = 1e+6 // g
cgsm_metric_ton is a public constant used by this module.
const cgsm_uk_ton = 1.0160469088e+6 // g
cgsm_uk_ton is a public constant used by this module.
const cgsm_troy_ounce = 3.1103475e+1 // g
cgsm_troy_ounce is a public constant used by this module.
const cgsm_carat = 2e-1 // g
cgsm_carat is a public constant used by this module.
const cgsm_unified_atomic_mass = 1.660538782e-24 // g
cgsm_unified_atomic_mass is a public constant used by this module.
const cgsm_gram_force = 9.80665e+2 // cm g / s^2
cgsm_gram_force is a public constant used by this module.
const cgsm_pound_force = 4.44822161526e+5 // cm g / s^2
cgsm_pound_force is a public constant used by this module.
const cgsm_kilopound_force = 4.44822161526e+8 // cm g / s^2
cgsm_kilopound_force is a public constant used by this module.
const cgsm_poundal = 1.38255e+4 // cm g / s^2
cgsm_poundal is a public constant used by this module.
const cgsm_calorie = 4.1868e+7 // g cm^2 / s^2
cgsm_calorie is a public constant used by this module.
const cgsm_btu = 1.05505585262e+10 // g cm^2 / s^2
cgsm_btu is a public constant used by this module.
const cgsm_therm = 1.05506e+15 // g cm^2 / s^2
cgsm_therm is a public constant used by this module.
const cgsm_horsepower = 7.457e+9 // g cm^2 / s^3
cgsm_horsepower is a public constant used by this module.
const cgsm_bar = 1e+6 // g / cm s^2
cgsm_bar is a public constant used by this module.
const cgsm_std_atmosphere = 1.01325e+6 // g / cm s^2
cgsm_std_atmosphere is a public constant used by this module.
const cgsm_torr = 1.33322368421e+3 // g / cm s^2
cgsm_torr is a public constant used by this module.
const cgsm_meter_of_mercury = 1.33322368421e+6 // g / cm s^2
cgsm_meter_of_mercury is a public constant used by this module.
const cgsm_inch_of_mercury = 3.38638815789e+4 // g / cm s^2
cgsm_inch_of_mercury is a public constant used by this module.
const cgsm_inch_of_water = 2.490889e+3 // g / cm s^2
cgsm_inch_of_water is a public constant used by this module.
const cgsm_psi = 6.89475729317e+4 // g / cm s^2
cgsm_psi is a public constant used by this module.
const cgsm_poise = 1e+0 // g / cm s
cgsm_poise is a public constant used by this module.
const cgsm_stokes = 1e+0 // cm^2 / s
cgsm_stokes is a public constant used by this module.
const cgsm_stilb = 1e+0 // cd / cm^2
cgsm_stilb is a public constant used by this module.
const cgsm_lumen = 1e+0 // cd sr
cgsm_lumen is a public constant used by this module.
const cgsm_lux = 1e-4 // cd sr / cm^2
cgsm_lux is a public constant used by this module.
const cgsm_phot = 1e+0 // cd sr / cm^2
cgsm_phot is a public constant used by this module.
const cgsm_footcandle = 1.076e-3 // cd sr / cm^2
cgsm_footcandle is a public constant used by this module.
const cgsm_lambert = 1e+0 // cd sr / cm^2
cgsm_lambert is a public constant used by this module.
const cgsm_footlambert = 1.07639104e-3 // cd sr / cm^2
cgsm_footlambert is a public constant used by this module.
const cgsm_curie = 3.7e+10 // 1 / s
cgsm_curie is a public constant used by this module.
const cgsm_roentgen = 2.58e-8 // abamp s / g
cgsm_roentgen is a public constant used by this module.
const cgsm_rad = 1e+2 // cm^2 / s^2
cgsm_rad is a public constant used by this module.
const cgsm_solar_mass = 1.98892e+33 // g
cgsm_solar_mass is a public constant used by this module.
const cgsm_bohr_radius = 5.291772083e-9 // cm
cgsm_bohr_radius is a public constant used by this module.
const cgsm_newton = 1e+5 // cm g / s^2
cgsm_newton is a public constant used by this module.
const cgsm_dyne = 1e+0 // cm g / s^2
cgsm_dyne is a public constant used by this module.
const cgsm_joule = 1e+7 // g cm^2 / s^2
cgsm_joule is a public constant used by this module.
const cgsm_erg = 1e+0 // g cm^2 / s^2
cgsm_erg is a public constant used by this module.
const cgsm_stefan_boltzmann_constant = 5.67040047374e-5 // g / k^4 s^3
cgsm_stefan_boltzmann_constant is a public constant used by this module.
const cgsm_thomson_cross_section = 6.65245893699e-25 // cm^2
cgsm_thomson_cross_section is a public constant used by this module.
const cgsm_bohr_magneton = 9.27400899e-21 // abamp cm^2
cgsm_bohr_magneton is a public constant used by this module.
const cgsm_nuclear_magneton = 5.05078317e-24 // abamp cm^2
cgsm_nuclear_magneton is a public constant used by this module.
const cgsm_electron_magnetic_moment = 9.28476362e-21 // abamp cm^2
cgsm_electron_magnetic_moment is a public constant used by this module.
const cgsm_proton_magnetic_moment = 1.410606633e-23 // abamp cm^2
cgsm_proton_magnetic_moment is a public constant used by this module.
const cgsm_faraday = 9.64853429775e+3 // abamp s / mol
cgsm_faraday is a public constant used by this module.
const cgsm_electron_charge = 1.602176487e-20 // abamp s
cgsm_electron_charge is a public constant used by this module.
const mks_speed_of_light = 2.99792458e+8 // m / s
mks_speed_of_light is a public constant used by this module.
const mks_gravitational_constant = 6.673e-11 // m^3 / kg s^2
mks_gravitational_constant is a public constant used by this module.
const mks_plancks_constant_h = 6.62606896e-34 // kg m^2 / s
mks_plancks_constant_h is a public constant used by this module.
const mks_plancks_constant_hbar = 1.05457162825e-34 // kg m^2 / s
mks_plancks_constant_hbar is a public constant used by this module.
const mks_planck_temperature = 1.416785e+32 // Kelvin
mks_planck_temperature is a public constant used by this module.
const mks_astronomical_unit = 1.49597870691e+11 // m
mks_astronomical_unit is a public constant used by this module.
const mks_light_year = 9.46053620707e+15 // m
mks_light_year is a public constant used by this module.
const mks_parsec = 3.08567758135e+16 // m
mks_parsec is a public constant used by this module.
const mks_grav_accel = 9.80665e+0 // m / s^2
mks_grav_accel is a public constant used by this module.
const mks_electron_volt = 1.602176487e-19 // kg m^2 / s^2
mks_electron_volt is a public constant used by this module.
const mks_mass_electron = 9.10938188e-31 // kg
mks_mass_electron is a public constant used by this module.
const mks_mass_muon = 1.88353109e-28 // kg
mks_mass_muon is a public constant used by this module.
const mks_mass_proton = 1.67262158e-27 // kg
mks_mass_proton is a public constant used by this module.
const mks_mass_neutron = 1.67492716e-27 // kg
mks_mass_neutron is a public constant used by this module.
const mks_rydberg = 2.17987196968e-18 // kg m^2 / s^2
mks_rydberg is a public constant used by this module.
const mks_boltzmann = 1.3806504e-23 // kg m^2 / k s^2
mks_boltzmann is a public constant used by this module.
const mks_molar_gas = 8.314472e+0 // kg m^2 / k mol s^2
mks_molar_gas is a public constant used by this module.
const mks_standard_gas_volume = 2.2710981e-2 // m^3 / mol
mks_standard_gas_volume is a public constant used by this module.
const mks_minute = 6e+1 // s
mks_minute is a public constant used by this module.
const mks_hour = 3.6e+3 // s
mks_hour is a public constant used by this module.
const mks_day = 8.64e+4 // s
mks_day is a public constant used by this module.
const mks_week = 6.048e+5 // s
mks_week is a public constant used by this module.
const mks_inch = 2.54e-2 // m
mks_inch is a public constant used by this module.
const mks_foot = 3.048e-1 // m
mks_foot is a public constant used by this module.
const mks_yard = 9.144e-1 // m
mks_yard is a public constant used by this module.
const mks_mile = 1.609344e+3 // m
mks_mile is a public constant used by this module.
const mks_nautical_mile = 1.852e+3 // m
mks_nautical_mile is a public constant used by this module.
const mks_fathom = 1.8288e+0 // m
mks_fathom is a public constant used by this module.
const mks_mil = 2.54e-5 // m
mks_mil is a public constant used by this module.
const mks_point = 3.52777777778e-4 // m
mks_point is a public constant used by this module.
const mks_texpoint = 3.51459803515e-4 // m
mks_texpoint is a public constant used by this module.
const mks_micron = 1e-6 // m
mks_micron is a public constant used by this module.
const mks_angstrom = 1e-10 // m
mks_angstrom is a public constant used by this module.
const mks_hectare = 1e+4 // m^2
mks_hectare is a public constant used by this module.
const mks_acre = 4.04685642241e+3 // m^2
mks_acre is a public constant used by this module.
const mks_barn = 1e-28 // m^2
mks_barn is a public constant used by this module.
const mks_liter = 1e-3 // m^3
mks_liter is a public constant used by this module.
const mks_us_gallon = 3.78541178402e-3 // m^3
mks_us_gallon is a public constant used by this module.
const mks_quart = 9.46352946004e-4 // m^3
mks_quart is a public constant used by this module.
const mks_pint = 4.73176473002e-4 // m^3
mks_pint is a public constant used by this module.
const mks_cup = 2.36588236501e-4 // m^3
mks_cup is a public constant used by this module.
const mks_fluid_ounce = 2.95735295626e-5 // m^3
mks_fluid_ounce is a public constant used by this module.
const mks_tablespoon = 1.47867647813e-5 // m^3
mks_tablespoon is a public constant used by this module.
const mks_teaspoon = 4.92892159375e-6 // m^3
mks_teaspoon is a public constant used by this module.
const mks_canadian_gallon = 4.54609e-3 // m^3
mks_canadian_gallon is a public constant used by this module.
const mks_uk_gallon = 4.546092e-3 // m^3
mks_uk_gallon is a public constant used by this module.
const mks_miles_per_hour = 4.4704e-1 // m / s
mks_miles_per_hour is a public constant used by this module.
const mks_kilometers_per_hour = 2.77777777778e-1 // m / s
mks_kilometers_per_hour is a public constant used by this module.
const mks_knot = 5.14444444444e-1 // m / s
mks_knot is a public constant used by this module.
const mks_pound_mass = 4.5359237e-1 // kg
mks_pound_mass is a public constant used by this module.
const mks_ounce_mass = 2.8349523125e-2 // kg
mks_ounce_mass is a public constant used by this module.
const mks_ton = 9.0718474e+2 // kg
mks_ton is a public constant used by this module.
const mks_metric_ton = 1e+3 // kg
mks_metric_ton is a public constant used by this module.
const mks_uk_ton = 1.0160469088e+3 // kg
mks_uk_ton is a public constant used by this module.
const mks_troy_ounce = 3.1103475e-2 // kg
mks_troy_ounce is a public constant used by this module.
const mks_carat = 2e-4 // kg
mks_carat is a public constant used by this module.
const mks_unified_atomic_mass = 1.660538782e-27 // kg
mks_unified_atomic_mass is a public constant used by this module.
const mks_gram_force = 9.80665e-3 // kg m / s^2
mks_gram_force is a public constant used by this module.
const mks_pound_force = 4.44822161526e+0 // kg m / s^2
mks_pound_force is a public constant used by this module.
const mks_kilopound_force = 4.44822161526e+3 // kg m / s^2
mks_kilopound_force is a public constant used by this module.
const mks_poundal = 1.38255e-1 // kg m / s^2
mks_poundal is a public constant used by this module.
const mks_calorie = 4.1868e+0 // kg m^2 / s^2
mks_calorie is a public constant used by this module.
const mks_btu = 1.05505585262e+3 // kg m^2 / s^2
mks_btu is a public constant used by this module.
const mks_therm = 1.05506e+8 // kg m^2 / s^2
mks_therm is a public constant used by this module.
const mks_horsepower = 7.457e+2 // kg m^2 / s^3
mks_horsepower is a public constant used by this module.
const mks_bar = 1e+5 // kg / m s^2
mks_bar is a public constant used by this module.
const mks_std_atmosphere = 1.01325e+5 // kg / m s^2
mks_std_atmosphere is a public constant used by this module.
const mks_torr = 1.33322368421e+2 // kg / m s^2
mks_torr is a public constant used by this module.
const mks_meter_of_mercury = 1.33322368421e+5 // kg / m s^2
mks_meter_of_mercury is a public constant used by this module.
const mks_inch_of_mercury = 3.38638815789e+3 // kg / m s^2
mks_inch_of_mercury is a public constant used by this module.
const mks_inch_of_water = 2.490889e+2 // kg / m s^2
mks_inch_of_water is a public constant used by this module.
const mks_psi = 6.89475729317e+3 // kg / m s^2
mks_psi is a public constant used by this module.
const mks_poise = 1e-1 // kg m^-1 s^-1
mks_poise is a public constant used by this module.
const mks_stokes = 1e-4 // m^2 / s
mks_stokes is a public constant used by this module.
const mks_stilb = 1e+4 // cd / m^2
mks_stilb is a public constant used by this module.
const mks_lumen = 1e+0 // cd sr
mks_lumen is a public constant used by this module.
const mks_lux = 1e+0 // cd sr / m^2
mks_lux is a public constant used by this module.
const mks_phot = 1e+4 // cd sr / m^2
mks_phot is a public constant used by this module.
const mks_footcandle = 1.076e+1 // cd sr / m^2
mks_footcandle is a public constant used by this module.
const mks_lambert = 1e+4 // cd sr / m^2
mks_lambert is a public constant used by this module.
const mks_footlambert = 1.07639104e+1 // cd sr / m^2
mks_footlambert is a public constant used by this module.
const mks_curie = 3.7e+10 // 1 / s
mks_curie is a public constant used by this module.
const mks_roentgen = 2.58e-4 // a s / kg
mks_roentgen is a public constant used by this module.
const mks_rad = 1e-2 // m^2 / s^2
mks_rad is a public constant used by this module.
const mks_solar_mass = 1.98892e+30 // kg
mks_solar_mass is a public constant used by this module.
const mks_bohr_radius = 5.291772083e-11 // m
mks_bohr_radius is a public constant used by this module.
const mks_newton = 1e+0 // kg m / s^2
mks_newton is a public constant used by this module.
const mks_dyne = 1e-5 // kg m / s^2
mks_dyne is a public constant used by this module.
const mks_joule = 1e+0 // kg m^2 / s^2
mks_joule is a public constant used by this module.
const mks_erg = 1e-7 // kg m^2 / s^2
mks_erg is a public constant used by this module.
const mks_stefan_boltzmann_constant = 5.67040047374e-8 // kg / k^4 s^3
mks_stefan_boltzmann_constant is a public constant used by this module.
const mks_thomson_cross_section = 6.65245893699e-29 // m^2
mks_thomson_cross_section is a public constant used by this module.
const mks_bohr_magneton = 9.27400899e-24 // a m^2
mks_bohr_magneton is a public constant used by this module.
const mks_nuclear_magneton = 5.05078317e-27 // a m^2
mks_nuclear_magneton is a public constant used by this module.
const mks_electron_magnetic_moment = 9.28476362e-24 // a m^2
mks_electron_magnetic_moment is a public constant used by this module.
const mks_proton_magnetic_moment = 1.410606633e-26 // a m^2
mks_proton_magnetic_moment is a public constant used by this module.
const mks_faraday = 9.64853429775e+4 // a s / mol
mks_faraday is a public constant used by this module.
const mks_electron_charge = 1.602176487e-19 // a s
mks_electron_charge is a public constant used by this module.
const mks_vacuum_permittivity = 8.854187817e-12 // a^2 s^4 / kg m^3
mks_vacuum_permittivity is a public constant used by this module.
const mks_vacuum_permeability = 1.25663706144e-6 // kg m / a^2 s^2
mks_vacuum_permeability is a public constant used by this module.
const mks_debye = 3.33564095198e-30 // a s^2 / m^2
mks_debye is a public constant used by this module.
const mks_gauss = 1e-4 // kg / a s^2
mks_gauss is a public constant used by this module.
const mksa_speed_of_light = 2.99792458e+8 // m / s
mksa_speed_of_light is a public constant used by this module.
const mksa_gravitational_constant = 6.673e-11 // m^3 / kg s^2
mksa_gravitational_constant is a public constant used by this module.
const mksa_plancks_constant_h = 6.62606896e-34 // kg m^2 / s
mksa_plancks_constant_h is a public constant used by this module.
const mksa_plancks_constant_hbar = 1.05457162825e-34 // kg m^2 / s
mksa_plancks_constant_hbar is a public constant used by this module.
const mksa_planck_temperature = 1.416785e+32 // Kelvin
mksa_planck_temperature is a public constant used by this module.
const mksa_astronomical_unit = 1.49597870691e+11 // m
mksa_astronomical_unit is a public constant used by this module.
const mksa_light_year = 9.46053620707e+15 // m
mksa_light_year is a public constant used by this module.
const mksa_parsec = 3.08567758135e+16 // m
mksa_parsec is a public constant used by this module.
const mksa_grav_accel = 9.80665e+0 // m / s^2
mksa_grav_accel is a public constant used by this module.
const mksa_electron_volt = 1.602176487e-19 // kg m^2 / s^2
mksa_electron_volt is a public constant used by this module.
const mksa_mass_electron = 9.10938188e-31 // kg
mksa_mass_electron is a public constant used by this module.
const mksa_mass_muon = 1.88353109e-28 // kg
mksa_mass_muon is a public constant used by this module.
const mksa_mass_proton = 1.67262158e-27 // kg
mksa_mass_proton is a public constant used by this module.
const mksa_mass_neutron = 1.67492716e-27 // kg
mksa_mass_neutron is a public constant used by this module.
const mksa_rydberg = 2.17987196968e-18 // kg m^2 / s^2
mksa_rydberg is a public constant used by this module.
const mksa_boltzmann = 1.3806504e-23 // kg m^2 / k s^2
mksa_boltzmann is a public constant used by this module.
const mksa_molar_gas = 8.314472e+0 // kg m^2 / k mol s^2
mksa_molar_gas is a public constant used by this module.
const mksa_standard_gas_volume = 2.2710981e-2 // m^3 / mol
mksa_standard_gas_volume is a public constant used by this module.
const mksa_minute = 6e+1 // s
mksa_minute is a public constant used by this module.
const mksa_hour = 3.6e+3 // s
mksa_hour is a public constant used by this module.
const mksa_day = 8.64e+4 // s
mksa_day is a public constant used by this module.
const mksa_week = 6.048e+5 // s
mksa_week is a public constant used by this module.
const mksa_inch = 2.54e-2 // m
mksa_inch is a public constant used by this module.
const mksa_foot = 3.048e-1 // m
mksa_foot is a public constant used by this module.
const mksa_yard = 9.144e-1 // m
mksa_yard is a public constant used by this module.
const mksa_mile = 1.609344e+3 // m
mksa_mile is a public constant used by this module.
const mksa_nautical_mile = 1.852e+3 // m
mksa_nautical_mile is a public constant used by this module.
const mksa_fathom = 1.8288e+0 // m
mksa_fathom is a public constant used by this module.
const mksa_mil = 2.54e-5 // m
mksa_mil is a public constant used by this module.
const mksa_point = 3.52777777778e-4 // m
mksa_point is a public constant used by this module.
const mksa_texpoint = 3.51459803515e-4 // m
mksa_texpoint is a public constant used by this module.
const mksa_micron = 1e-6 // m
mksa_micron is a public constant used by this module.
const mksa_angstrom = 1e-10 // m
mksa_angstrom is a public constant used by this module.
const mksa_hectare = 1e+4 // m^2
mksa_hectare is a public constant used by this module.
const mksa_acre = 4.04685642241e+3 // m^2
mksa_acre is a public constant used by this module.
const mksa_barn = 1e-28 // m^2
mksa_barn is a public constant used by this module.
const mksa_liter = 1e-3 // m^3
mksa_liter is a public constant used by this module.
const mksa_us_gallon = 3.78541178402e-3 // m^3
mksa_us_gallon is a public constant used by this module.
const mksa_quart = 9.46352946004e-4 // m^3
mksa_quart is a public constant used by this module.
const mksa_pint = 4.73176473002e-4 // m^3
mksa_pint is a public constant used by this module.
const mksa_cup = 2.36588236501e-4 // m^3
mksa_cup is a public constant used by this module.
const mksa_fluid_ounce = 2.95735295626e-5 // m^3
mksa_fluid_ounce is a public constant used by this module.
const mksa_tablespoon = 1.47867647813e-5 // m^3
mksa_tablespoon is a public constant used by this module.
const mksa_teaspoon = 4.92892159375e-6 // m^3
mksa_teaspoon is a public constant used by this module.
const mksa_canadian_gallon = 4.54609e-3 // m^3
mksa_canadian_gallon is a public constant used by this module.
const mksa_uk_gallon = 4.546092e-3 // m^3
mksa_uk_gallon is a public constant used by this module.
const mksa_miles_per_hour = 4.4704e-1 // m / s
mksa_miles_per_hour is a public constant used by this module.
const mksa_kilometers_per_hour = 2.77777777778e-1 // m / s
mksa_kilometers_per_hour is a public constant used by this module.
const mksa_knot = 5.14444444444e-1 // m / s
mksa_knot is a public constant used by this module.
const mksa_pound_mass = 4.5359237e-1 // kg
mksa_pound_mass is a public constant used by this module.
const mksa_ounce_mass = 2.8349523125e-2 // kg
mksa_ounce_mass is a public constant used by this module.
const mksa_ton = 9.0718474e+2 // kg
mksa_ton is a public constant used by this module.
const mksa_metric_ton = 1e+3 // kg
mksa_metric_ton is a public constant used by this module.
const mksa_uk_ton = 1.0160469088e+3 // kg
mksa_uk_ton is a public constant used by this module.
const mksa_troy_ounce = 3.1103475e-2 // kg
mksa_troy_ounce is a public constant used by this module.
const mksa_carat = 2e-4 // kg
mksa_carat is a public constant used by this module.
const mksa_unified_atomic_mass = 1.660538782e-27 // kg
mksa_unified_atomic_mass is a public constant used by this module.
const mksa_gram_force = 9.80665e-3 // kg m / s^2
mksa_gram_force is a public constant used by this module.
const mksa_pound_force = 4.44822161526e+0 // kg m / s^2
mksa_pound_force is a public constant used by this module.
const mksa_kilopound_force = 4.44822161526e+3 // kg m / s^2
mksa_kilopound_force is a public constant used by this module.
const mksa_poundal = 1.38255e-1 // kg m / s^2
mksa_poundal is a public constant used by this module.
const mksa_calorie = 4.1868e+0 // kg m^2 / s^2
mksa_calorie is a public constant used by this module.
const mksa_btu = 1.05505585262e+3 // kg m^2 / s^2
mksa_btu is a public constant used by this module.
const mksa_therm = 1.05506e+8 // kg m^2 / s^2
mksa_therm is a public constant used by this module.
const mksa_horsepower = 7.457e+2 // kg m^2 / s^3
mksa_horsepower is a public constant used by this module.
const mksa_bar = 1e+5 // kg / m s^2
mksa_bar is a public constant used by this module.
const mksa_std_atmosphere = 1.01325e+5 // kg / m s^2
mksa_std_atmosphere is a public constant used by this module.
const mksa_torr = 1.33322368421e+2 // kg / m s^2
mksa_torr is a public constant used by this module.
const mksa_meter_of_mercury = 1.33322368421e+5 // kg / m s^2
mksa_meter_of_mercury is a public constant used by this module.
const mksa_inch_of_mercury = 3.38638815789e+3 // kg / m s^2
mksa_inch_of_mercury is a public constant used by this module.
const mksa_inch_of_water = 2.490889e+2 // kg / m s^2
mksa_inch_of_water is a public constant used by this module.
const mksa_psi = 6.89475729317e+3 // kg / m s^2
mksa_psi is a public constant used by this module.
const mksa_poise = 1e-1 // kg m^-1 s^-1
mksa_poise is a public constant used by this module.
const mksa_stokes = 1e-4 // m^2 / s
mksa_stokes is a public constant used by this module.
const mksa_stilb = 1e+4 // cd / m^2
mksa_stilb is a public constant used by this module.
const mksa_lumen = 1e+0 // cd sr
mksa_lumen is a public constant used by this module.
const mksa_lux = 1e+0 // cd sr / m^2
mksa_lux is a public constant used by this module.
const mksa_phot = 1e+4 // cd sr / m^2
mksa_phot is a public constant used by this module.
const mksa_footcandle = 1.076e+1 // cd sr / m^2
mksa_footcandle is a public constant used by this module.
const mksa_lambert = 1e+4 // cd sr / m^2
mksa_lambert is a public constant used by this module.
const mksa_footlambert = 1.07639104e+1 // cd sr / m^2
mksa_footlambert is a public constant used by this module.
const mksa_curie = 3.7e+10 // 1 / s
mksa_curie is a public constant used by this module.
const mksa_roentgen = 2.58e-4 // a s / kg
mksa_roentgen is a public constant used by this module.
const mksa_rad = 1e-2 // m^2 / s^2
mksa_rad is a public constant used by this module.
const mksa_solar_mass = 1.98892e+30 // kg
mksa_solar_mass is a public constant used by this module.
const mksa_bohr_radius = 5.291772083e-11 // m
mksa_bohr_radius is a public constant used by this module.
const mksa_newton = 1e+0 // kg m / s^2
mksa_newton is a public constant used by this module.
const mksa_dyne = 1e-5 // kg m / s^2
mksa_dyne is a public constant used by this module.
const mksa_joule = 1e+0 // kg m^2 / s^2
mksa_joule is a public constant used by this module.
const mksa_erg = 1e-7 // kg m^2 / s^2
mksa_erg is a public constant used by this module.
const mksa_stefan_boltzmann_constant = 5.67040047374e-8 // kg / k^4 s^3
mksa_stefan_boltzmann_constant is a public constant used by this module.
const mksa_thomson_cross_section = 6.65245893699e-29 // m^2
mksa_thomson_cross_section is a public constant used by this module.
const mksa_bohr_magneton = 9.27400899e-24 // a m^2
mksa_bohr_magneton is a public constant used by this module.
const mksa_nuclear_magneton = 5.05078317e-27 // a m^2
mksa_nuclear_magneton is a public constant used by this module.
const mksa_electron_magnetic_moment = 9.28476362e-24 // a m^2
mksa_electron_magnetic_moment is a public constant used by this module.
const mksa_proton_magnetic_moment = 1.410606633e-26 // a m^2
mksa_proton_magnetic_moment is a public constant used by this module.
const mksa_faraday = 9.64853429775e+4 // a s / mol
mksa_faraday is a public constant used by this module.
const mksa_electron_charge = 1.602176487e-19 // a s
mksa_electron_charge is a public constant used by this module.
const mksa_vacuum_permittivity = 8.854187817e-12 // a^2 s^4 / kg m^3
mksa_vacuum_permittivity is a public constant used by this module.
const mksa_vacuum_permeability = 1.25663706144e-6 // kg m / a^2 s^2
mksa_vacuum_permeability is a public constant used by this module.
const mksa_debye = 3.33564095198e-30 // a s^2 / m^2
mksa_debye is a public constant used by this module.
const mksa_gauss = 1e-4 // kg / a s^2
mksa_gauss is a public constant used by this module.
const num_fine_structure = 7.297352533e-3 // 1
num_fine_structure is a public constant used by this module.
const num_avogadro = 6.02214199e+23 // 1 / mol
num_avogadro is a public constant used by this module.
const num_yotta = 1e+24 // 1
num_yotta is a public constant used by this module.
const num_zetta = 1e+21 // 1
num_zetta is a public constant used by this module.
const num_exa = 1e+18 // 1
num_exa is a public constant used by this module.
const num_peta = 1e+15 // 1
num_peta is a public constant used by this module.
const num_tera = 1e+12 // 1
num_tera is a public constant used by this module.
const num_giga = 1e+9 // 1
num_giga is a public constant used by this module.
const num_mega = 1e+6 // 1
num_mega is a public constant used by this module.
const num_kilo = 1e+3 // 1
num_kilo is a public constant used by this module.
const num_milli = 1e-3 // 1
num_milli is a public constant used by this module.
const num_micro = 1e-6 // 1
num_micro is a public constant used by this module.
const num_cml_nano = 1e-9 // 1
num_cml_nano is a public constant used by this module.
const num_pico = 1e-12 // 1
num_pico is a public constant used by this module.
const num_femto = 1e-15 // 1
num_femto is a public constant used by this module.
const num_atto = 1e-18 // 1
num_atto is a public constant used by this module.
const num_zepto = 1e-21 // 1
num_zepto is a public constant used by this module.
const num_yocto = 1e-24 // 1
num_yocto is a public constant used by this module.