====================================== ``brainunit.constants`` module ====================================== .. currentmodule:: brainunit.constants Physical and mathematical constants and units. Physical constants ================== ==================== ================== ======================= ================================================================== Constant Symbol(s) name Value ==================== ================== ======================= ================================================================== Avogadro constant :math:`N_A, L` ``avogadro`` :math:`6.022140857\times 10^{23}\,\mathrm{mol}^{-1}` Boltzmann constant :math:`k` ``boltzmann`` :math:`1.38064852\times 10^{-23}\,\mathrm{J}\,\mathrm{K}^{-1}` Electric constant :math:`\epsilon_0` ``electric`` :math:`8.854187817\times 10^{-12}\,\mathrm{F}\,\mathrm{m}^{-1}` Electron mass :math:`m_e` ``electron_mass`` :math:`9.10938356\times 10^{-31}\,\mathrm{kg}` Elementary charge :math:`e` ``elementary_charge`` :math:`1.6021766208\times 10^{-19}\,\mathrm{C}` Faraday constant :math:`F` ``faraday`` :math:`96485.33289\,\mathrm{C}\,\mathrm{mol}^{-1}` Gas constant :math:`R` ``gas`` :math:`8.3144598\,\mathrm{J}\,\mathrm{mol}^{-1}\,\mathrm{K}^{-1}` Magnetic constant :math:`\mu_0` ``magnetic`` :math:`12.566370614\times 10^{-7}\,\mathrm{N}\,\mathrm{A}^{-2}` Molar mass constant :math:`M_u` ``molar_mass`` :math:`1\times 10^{-3}\,\mathrm{kg}\,\mathrm{mol}^{-1}` 0°C ``zero_celsius`` :math:`273.15\,\mathrm{K}` ==================== ================== ======================= ================================================================== Mass ---- ================= ============================================================ ``gram`` :math:`10^{-3}` kg ``metric_ton`` :math:`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) ================= ============================================================ Angle ----- ================= ============================================================ ``degree`` degree in radians ``arcmin`` arc minute in radians ``arcminute`` arc minute in radians ``arcsec`` arc second in radians ``arcsecond`` arc second in radians ================= ============================================================ Time ---- ================= ============================================================ ``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 ================= ============================================================ Length ------ ===================== ============================================================ ``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 ===================== ============================================================ Pressure -------- ================= ============================================================ ``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 ================= ============================================================ Area ---- ================= ============================================================ ``hectare`` one hectare in square meters ``acre`` one acre in square meters ================= ============================================================ Volume ------ =================== ======================================================== ``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 =================== ======================================================== Speed ----- ================== ========================================================== ``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 ================== ========================================================== Temperature ----------- ===================== ======================================================= ``zero_Celsius`` zero of Celsius scale in Kelvin ``degree_Fahrenheit`` one Fahrenheit (only differences) in Kelvins ===================== ======================================================= Energy ------ ==================== ======================================================= ``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 ==================== ======================================================= Power ----- ==================== ======================================================= ``hp`` one horsepower in watts ``horsepower`` one horsepower in watts ==================== ======================================================= Force ----- ==================== ======================================================= ``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 ==================== =======================================================