brainunit.constants module

`brainunit.constants` module#

Physical and mathematical constants and units.

Constant	Symbol(s)	name	Value
Avogadro constant	\(N_A, L\)	`avogadro`	\(6.022140857\times 10^{23}\,\mathrm{mol}^{-1}\)
Boltzmann constant	\(k\)	`boltzmann`	\(1.38064852\times 10^{-23}\,\mathrm{J}\,\mathrm{K}^{-1}\)
Electric constant	\(\epsilon_0\)	`electric`	\(8.854187817\times 10^{-12}\,\mathrm{F}\,\mathrm{m}^{-1}\)
Electron mass	\(m_e\)	`electron_mass`	\(9.10938356\times 10^{-31}\,\mathrm{kg}\)
Elementary charge	\(e\)	`elementary_charge`	\(1.6021766208\times 10^{-19}\,\mathrm{C}\)
Faraday constant	\(F\)	`faraday`	\(96485.33289\,\mathrm{C}\,\mathrm{mol}^{-1}\)
Gas constant	\(R\)	`gas`	\(8.3144598\,\mathrm{J}\,\mathrm{mol}^{-1}\,\mathrm{K}^{-1}\)
Magnetic constant	\(\mu_0\)	`magnetic`	\(12.566370614\times 10^{-7}\,\mathrm{N}\,\mathrm{A}^{-2}\)
Molar mass constant	\(M_u\)	`molar_mass`	\(1\times 10^{-3}\,\mathrm{kg}\,\mathrm{mol}^{-1}\)
0°C		`zero_celsius`	\(273.15\,\mathrm{K}\)

`gram`	\(10^{-3}\) kg
`metric_ton`	\(10^{3}\) kg
`grain`	one grain in kg
`lb`	one pound (avoirdupous) in kg
`pound`	one pound (avoirdupous) in kg
`blob`	one inch version of a slug in kg (added in 1.0.0)
`slinch`	one inch version of a slug in kg (added in 1.0.0)
`slug`	one slug in kg (added in 1.0.0)
`oz`	one ounce in kg
`ounce`	one ounce in kg
`stone`	one stone in kg
`grain`	one grain in kg
`long_ton`	one long ton in kg
`short_ton`	one short ton in kg
`troy_ounce`	one Troy ounce in kg
`troy_pound`	one Troy pound in kg
`carat`	one carat in kg
`m_u`	atomic mass constant (in kg)
`u`	atomic mass constant (in kg)
`atomic_mass`	atomic mass constant (in kg)

`minute`	one minute in seconds
`hour`	one hour in seconds
`day`	one day in seconds
`week`	one week in seconds
`year`	one year (365 days) in seconds
`Julian_year`	one Julian year (365.25 days) in seconds

`inch`	one inch in meters
`foot`	one foot in meters
`yard`	one yard in meters
`mile`	one mile in meters
`mil`	one mil in meters
`pt`	one point in meters
`point`	one point in meters
`survey_foot`	one survey foot in meters
`survey_mile`	one survey mile in meters
`nautical_mile`	one nautical mile in meters
`fermi`	one Fermi in meters
`angstrom`	one Angstrom in meters
`micron`	one micron in meters
`au`	one astronomical unit in meters
`astronomical_unit`	one astronomical unit in meters
`light_year`	one light year in meters
`parsec`	one parsec in meters

`atm`	standard atmosphere in pascals
`atmosphere`	standard atmosphere in pascals
`bar`	one bar in pascals
`torr`	one torr (mmHg) in pascals
`mmHg`	one torr (mmHg) in pascals
`psi`	one psi in pascals

`hectare`	one hectare in square meters
`acre`	one acre in square meters

`liter`	one liter in cubic meters
`litre`	one liter in cubic meters
`gallon`	one gallon (US) in cubic meters
`gallon_US`	one gallon (US) in cubic meters
`gallon_imp`	one gallon (UK) in cubic meters
`fluid_ounce`	one fluid ounce (US) in cubic meters
`fluid_ounce_US`	one fluid ounce (US) in cubic meters
`fluid_ounce_imp`	one fluid ounce (UK) in cubic meters
`bbl`	one barrel in cubic meters
`barrel`	one barrel in cubic meters

`kmh`	kilometers per hour in meters per second
`mph`	miles per hour in meters per second
`mach`	one Mach (approx., at 15 C, 1 atm) in meters per second
`speed_of_sound`	one Mach (approx., at 15 C, 1 atm) in meters per second
`knot`	one knot in meters per second

`zero_Celsius`	zero of Celsius scale in Kelvin
`degree_Fahrenheit`	one Fahrenheit (only differences) in Kelvins

`eV`	one electron volt in Joules
`electron_volt`	one electron volt in Joules
`calorie`	one calorie (thermochemical) in Joules
`calorie_th`	one calorie (thermochemical) in Joules
`calorie_IT`	one calorie (International Steam Table calorie, 1956) in Joules
`erg`	one erg in Joules
`Btu`	one British thermal unit (International Steam Table) in Joules
`Btu_IT`	one British thermal unit (International Steam Table) in Joules
`Btu_th`	one British thermal unit (thermochemical) in Joules
`ton_TNT`	one ton of TNT in Joules

`hp`	one horsepower in watts
`horsepower`	one horsepower in watts

`dyn`	one dyne in newtons
`dyne`	one dyne in newtons
`lbf`	one pound force in newtons
`pound_force`	one pound force in newtons
`kgf`	one kilogram force in newtons
`kilogram_force`	one kilogram force in newtons