Constants¶
-
class
dotdict
¶
-
electron_mass
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=universal_in!', 'name': 'Electron Rest Mass', 'subscript': 'e', 'symbol': 'm', 'units': 'mega electron*volts/c^2', 'url': 'http://www.constants.datanab.net/physics/electron_mass_json', 'value': 0.51099891}¶ The mass of the electron.
-
planck_constant
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=universal_in!', 'name': 'Planck Constant', 'subscript': '', 'symbol': 'h', 'units': 'joule*seconds', 'url': 'http://www.constants.datanab.net/physics/planck_constant_json', 'value': 6.62606957e-34}¶ Planck’s constant.
-
standard_gravity
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=universal_in!', 'name': 'Standard Gravity', 'subscript': '', 'symbol': 'g', 'units': 'meters/(seconds^2)', 'url': 'http://www.constants.datanab.net/physics/standard_gravity_json', 'value': 9.80665}¶ Earth’s gravity at the surface.
-
vacuum_impedance
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?z0|search_for=universal_in!', 'name': 'Characteristic Impedance of a Vacuum', 'subscript': '0', 'symbol': 'Z', 'units': 'ohms', 'url': 'http://www.constants.datanab.net/physics/characteristic_impedance_of_vacuum_json', 'value': 376.730313461}¶ The impedance of a perfect vacuum.
-
vacuum_permeability
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=universal_in!', 'name': 'Vacuum Permeability', 'subscript': '0', 'symbol': 'µ', 'units': 'Newton/Ampere^2', 'url': 'http://www.constants.datanab.net/physics/vacuum_permeability_json', 'value': 1.2566370614e-06}¶ The permeability of a perfect vacuum.
-
vacuum_permittivity
= {'citation': 'http://physics.nist.gov/cgi-bin/cuu/Value?ep0|search_for=universal_in!', 'name': 'Vacuum Permittivity', 'subscript': '0', 'symbol': 'ε', 'units': 'farad/meters', 'url': 'http://www.constants.datanab.net/physics/vacuum_permittivity_json', 'value': 8.854187817e-12}¶ The permittivity of a perfect vacuum.