{"Quantity":"lattice spacing of silicon","Value":1.92016e-10,"Uncertainty":3.2e-18,"Unit":"m"}
{"Quantity":"alpha particle-electron mass ratio","Value":7294.29954,"Uncertainty":2.9e-06,"Unit":""}
{"Quantity":"alpha particle mass","Value":6.64466e-27,"Uncertainty":2.9e-34,"Unit":"kg"}
{"Quantity":"alpha particle mass energy equivalent","Value":5.97192e-10,"Uncertainty":2.6e-17,"Unit":"J"}
{"Quantity":"alpha particle mass energy equivalent in MeV","Value":3727.37924,"Uncertainty":0.00008,"Unit":"MeV"}
{"Quantity":"alpha particle mass in u","Value":4.00151,"Uncertainty":6.2e-11,"Unit":"u"}
{"Quantity":"alpha particle molar mass","Value":0.004,"Uncertainty":6.2e-14,"Unit":"kg mol^-1"}
{"Quantity":"alpha particle-proton mass ratio","Value":3.9726,"Uncertainty":3.6e-10,"Unit":""}
{"Quantity":"Angstrom star","Value":1.00001e-10,"Uncertainty":9e-17,"Unit":"m"}
{"Quantity":"atomic mass constant","Value":1.66054e-27,"Uncertainty":7.3e-35,"Unit":"kg"}
{"Quantity":"atomic mass constant energy equivalent","Value":1.49242e-10,"Uncertainty":6.6e-18,"Unit":"J"}
{"Quantity":"atomic mass constant energy equivalent in MeV","Value":931.49406,"Uncertainty":0.00002,"Unit":"MeV"}
{"Quantity":"atomic mass unit-electron volt relationship","Value":931494061,"Uncertainty":21,"Unit":"eV"}
{"Quantity":"atomic mass unit-hartree relationship","Value":34231776.845,"Uncertainty":0.024,"Unit":"E_h"}
{"Quantity":"atomic mass unit-hertz relationship","Value":2.2523427167999999e+23,"Uncertainty":160000000000000,"Unit":"Hz"}
{"Quantity":"atomic mass unit-inverse meter relationship","Value":751300660420000,"Uncertainty":530000,"Unit":"m^-1"}
{"Quantity":"atomic mass unit-joule relationship","Value":1.49242e-10,"Uncertainty":6.6e-18,"Unit":"J"}
{"Quantity":"atomic mass unit-kelvin relationship","Value":10809540800000,"Uncertainty":9800000,"Unit":"K"}
{"Quantity":"atomic mass unit-kilogram relationship","Value":1.66054e-27,"Uncertainty":7.3e-35,"Unit":"kg"}
{"Quantity":"atomic unit of 1st hyperpolarizability","Value":3.20636e-53,"Uncertainty":7.1e-61,"Unit":"C^3 m^3 J^-2"}
{"Quantity":"atomic unit of 2nd hyperpolarizability","Value":6.23538e-65,"Uncertainty":2.8e-72,"Unit":"C^4 m^4 J^-3"}
{"Quantity":"atomic unit of action","Value":1.05457e-34,"Uncertainty":4.7e-42,"Unit":"J s"}
{"Quantity":"atomic unit of charge","Value":1.60218e-19,"Uncertainty":3.5e-27,"Unit":"C"}
{"Quantity":"atomic unit of charge density","Value":1081202338000,"Uncertainty":24000,"Unit":"C m^-3"}
{"Quantity":"atomic unit of current","Value":0.00662,"Uncertainty":1.5e-10,"Unit":"A"}
{"Quantity":"atomic unit of electric dipole mom.","Value":8.47835e-30,"Uncertainty":1.9e-37,"Unit":"C m"}
{"Quantity":"atomic unit of electric field","Value":514220652000,"Uncertainty":11000,"Unit":"V m^-1"}
{"Quantity":"atomic unit of electric field gradient","Value":9.7173619999999997e+21,"Uncertainty":210000000000000,"Unit":"V m^-2"}
{"Quantity":"atomic unit of electric polarizability","Value":1.64878e-41,"Uncertainty":1.6e-50,"Unit":"C^2 m^2 J^-1"}
{"Quantity":"atomic unit of electric potential","Value":27.21139,"Uncertainty":6e-07,"Unit":"V"}
{"Quantity":"atomic unit of electric quadrupole mom.","Value":4.48655e-40,"Uncertainty":9.9e-48,"Unit":"C m^2"}
{"Quantity":"atomic unit of energy","Value":4.35974e-18,"Uncertainty":1.9e-25,"Unit":"J"}
{"Quantity":"atomic unit of force","Value":8.23872e-08,"Uncertainty":3.6e-15,"Unit":"N"}
{"Quantity":"atomic unit of length","Value":5.29177e-11,"Uncertainty":1.7e-20,"Unit":"m"}
{"Quantity":"atomic unit of mag. dipole mom.","Value":1.8548e-23,"Uncertainty":4.1e-31,"Unit":"J T^-1"}
{"Quantity":"atomic unit of mag. flux density","Value":235051.7464,"Uncertainty":0.0052,"Unit":"T"}
{"Quantity":"atomic unit of magnetizability","Value":7.89104e-29,"Uncertainty":1.3e-37,"Unit":"J T^-2"}
{"Quantity":"atomic unit of mass","Value":9.10938e-31,"Uncertainty":4e-38,"Unit":"kg"}
{"Quantity":"atomic unit of mom.um","Value":1.99285e-24,"Uncertainty":8.8e-32,"Unit":"kg m s^-1"}
{"Quantity":"atomic unit of permittivity","Value":1.11265e-10,"Unit":"F m^-1"}
{"Quantity":"atomic unit of time","Value":2.41888e-17,"Uncertainty":1.2e-28,"Unit":"s"}
{"Quantity":"atomic unit of velocity","Value":2187691.26379,"Uncertainty":0.00071,"Unit":"m s^-1"}
{"Quantity":"Avogadro constant","Value":6.0221412899999997e+23,"Uncertainty":27000000000000000,"Unit":"mol^-1"}
{"Quantity":"Bohr magneton","Value":9.27401e-24,"Uncertainty":2e-31,"Unit":"J T^-1"}
{"Quantity":"Bohr magneton in eV/T","Value":0.00006,"Uncertainty":3.8e-14,"Unit":"eV T^-1"}
{"Quantity":"Bohr magneton in Hz/T","Value":13996245550,"Uncertainty":310,"Unit":"Hz T^-1"}
{"Quantity":"Bohr magneton in inverse meters per tesla","Value":46.68645,"Uncertainty":1e-06,"Unit":"m^-1 T^-1"}
{"Quantity":"Bohr magneton in K/T","Value":0.67171,"Uncertainty":6.1e-07,"Unit":"K T^-1"}
{"Quantity":"Bohr radius","Value":5.29177e-11,"Uncertainty":1.7e-20,"Unit":"m"}
{"Quantity":"Boltzmann constant","Value":1.38065e-23,"Uncertainty":1.3e-29,"Unit":"J K^-1"}
{"Quantity":"Boltzmann constant in eV/K","Value":0.00009,"Uncertainty":7.8e-11,"Unit":"eV K^-1"}
{"Quantity":"Boltzmann constant in Hz/K","Value":20836618000,"Uncertainty":19000,"Unit":"Hz K^-1"}
{"Quantity":"Boltzmann constant in inverse meters per kelvin","Value":69.50348,"Uncertainty":0.00006,"Unit":"m^-1 K^-1"}
{"Quantity":"characteristic impedance of vacuum","Value":376.73031,"Unit":"ohm"}
{"Quantity":"classical electron radius","Value":2.81794e-15,"Uncertainty":2.7e-24,"Unit":"m"}
{"Quantity":"Compton wavelength","Value":2.42631e-12,"Uncertainty":1.6e-21,"Unit":"m"}
{"Quantity":"Compton wavelength over 2 pi","Value":3.86159e-13,"Uncertainty":2.5e-22,"Unit":"m"}
{"Quantity":"conductance quantum","Value":0.00008,"Uncertainty":2.5e-14,"Unit":"S"}
{"Quantity":"conventional value of Josephson constant","Value":483597900000000,"Unit":"Hz V^-1"}
{"Quantity":"conventional value of von Klitzing constant","Value":25812.807,"Unit":"ohm"}
{"Quantity":"Cu x unit","Value":1.00208e-13,"Uncertainty":2.8e-20,"Unit":"m"}
{"Quantity":"deuteron-electron mag. mom. ratio","Value":-0.00047,"Uncertainty":3.9e-12,"Unit":""}
{"Quantity":"deuteron-electron mass ratio","Value":3670.48297,"Uncertainty":1.5e-06,"Unit":""}
{"Quantity":"deuteron g factor","Value":0.85744,"Uncertainty":7.2e-09,"Unit":""}
{"Quantity":"deuteron mag. mom.","Value":4.33073e-27,"Uncertainty":1e-34,"Unit":"J T^-1"}
{"Quantity":"deuteron mag. mom. to Bohr magneton ratio","Value":0.00047,"Uncertainty":3.9e-12,"Unit":""}
{"Quantity":"deuteron mag. mom. to nuclear magneton ratio","Value":0.85744,"Uncertainty":7.2e-09,"Unit":""}
{"Quantity":"deuteron mass","Value":3.34358e-27,"Uncertainty":1.5e-34,"Unit":"kg"}
{"Quantity":"deuteron mass energy equivalent","Value":3.00506e-10,"Uncertainty":1.3e-17,"Unit":"J"}
{"Quantity":"deuteron mass energy equivalent in MeV","Value":1875.61286,"Uncertainty":0.00004,"Unit":"MeV"}
{"Quantity":"deuteron mass in u","Value":2.01355,"Uncertainty":7.7e-11,"Unit":"u"}
{"Quantity":"deuteron molar mass","Value":0.00201,"Uncertainty":7.7e-14,"Unit":"kg mol^-1"}
{"Quantity":"deuteron-neutron mag. mom. ratio","Value":-0.44821,"Uncertainty":1.1e-07,"Unit":""}
{"Quantity":"deuteron-proton mag. mom. ratio","Value":0.30701,"Uncertainty":2.4e-09,"Unit":""}
{"Quantity":"deuteron-proton mass ratio","Value":1.99901,"Uncertainty":1.8e-10,"Unit":""}
{"Quantity":"deuteron rms charge radius","Value":2.1424e-15,"Uncertainty":2.1e-18,"Unit":"m"}
{"Quantity":"electric constant","Value":8.85419e-12,"Unit":"F m^-1"}
{"Quantity":"electron charge to mass quotient","Value":-175882008800,"Uncertainty":3900,"Unit":"C kg^-1"}
{"Quantity":"electron-deuteron mag. mom. ratio","Value":-2143.9235,"Uncertainty":0.00002,"Unit":""}
{"Quantity":"electron-deuteron mass ratio","Value":0.00027,"Uncertainty":1.1e-13,"Unit":""}
{"Quantity":"electron g factor","Value":-2.00232,"Uncertainty":5.3e-13,"Unit":""}
{"Quantity":"electron gyromag. ratio","Value":176085970800,"Uncertainty":3900,"Unit":"s^-1 T^-1"}
{"Quantity":"electron gyromag. ratio over 2 pi","Value":28024.95266,"Uncertainty":0.00062,"Unit":"MHz T^-1"}
{"Quantity":"electron-helion mass ratio","Value":0.00018,"Uncertainty":1.7e-13,"Unit":""}
{"Quantity":"electron mag. mom.","Value":-9.28476e-24,"Uncertainty":2.1e-31,"Unit":"J T^-1"}
{"Quantity":"electron mag. mom. anomaly","Value":0.00116,"Uncertainty":2.7e-13,"Unit":""}
{"Quantity":"electron mag. mom. to Bohr magneton ratio","Value":-1.00116,"Uncertainty":2.7e-13,"Unit":""}
{"Quantity":"electron mag. mom. to nuclear magneton ratio","Value":-1838.28197,"Uncertainty":7.5e-07,"Unit":""}
{"Quantity":"electron mass","Value":9.10938e-31,"Uncertainty":4e-38,"Unit":"kg"}
{"Quantity":"electron mass energy equivalent","Value":8.18711e-14,"Uncertainty":3.6e-21,"Unit":"J"}
{"Quantity":"electron mass energy equivalent in MeV","Value":0.511,"Uncertainty":1.1e-08,"Unit":"MeV"}
{"Quantity":"electron mass in u","Value":0.00055,"Uncertainty":2.2e-13,"Unit":"u"}
{"Quantity":"electron molar mass","Value":5.4858e-07,"Uncertainty":2.2e-16,"Unit":"kg mol^-1"}
{"Quantity":"electron-muon mag. mom. ratio","Value":206.76699,"Uncertainty":5.2e-06,"Unit":""}
{"Quantity":"electron-muon mass ratio","Value":0.00484,"Uncertainty":1.2e-10,"Unit":""}
{"Quantity":"electron-neutron mag. mom. ratio","Value":960.9205,"Uncertainty":0.00023,"Unit":""}
{"Quantity":"electron-neutron mass ratio","Value":0.00054,"Uncertainty":3.2e-13,"Unit":""}
{"Quantity":"electron-proton mag. mom. ratio","Value":-658.21068,"Uncertainty":5.4e-06,"Unit":""}
{"Quantity":"electron-proton mass ratio","Value":0.00054,"Uncertainty":2.2e-13,"Unit":""}
{"Quantity":"electron-tau mass ratio","Value":0.00029,"Uncertainty":2.6e-08,"Unit":""}
{"Quantity":"electron to alpha particle mass ratio","Value":0.00014,"Uncertainty":5.5e-14,"Unit":""}
{"Quantity":"electron to shielded helion mag. mom. ratio","Value":864.05826,"Uncertainty":1e-05,"Unit":""}
{"Quantity":"electron to shielded proton mag. mom. ratio","Value":-658.2276,"Uncertainty":7.2e-06,"Unit":""}
{"Quantity":"electron-triton mass ratio","Value":0.00018,"Uncertainty":1.7e-13,"Unit":""}
{"Quantity":"electron volt","Value":1.60218e-19,"Uncertainty":3.5e-27,"Unit":"J"}
{"Quantity":"electron volt-atomic mass unit relationship","Value":1.07354e-09,"Uncertainty":2.4e-17,"Unit":"u"}
{"Quantity":"electron volt-hartree relationship","Value":0.03675,"Uncertainty":8.1e-10,"Unit":"E_h"}
{"Quantity":"electron volt-hertz relationship","Value":241798934800000,"Uncertainty":5300000,"Unit":"Hz"}
{"Quantity":"electron volt-inverse meter relationship","Value":806554.429,"Uncertainty":0.018,"Unit":"m^-1"}
{"Quantity":"electron volt-joule relationship","Value":1.60218e-19,"Uncertainty":3.5e-27,"Unit":"J"}
{"Quantity":"electron volt-kelvin relationship","Value":11604.519,"Uncertainty":0.011,"Unit":"K"}
{"Quantity":"electron volt-kilogram relationship","Value":1.78266e-36,"Uncertainty":3.9e-44,"Unit":"kg"}
{"Quantity":"elementary charge","Value":1.60218e-19,"Uncertainty":3.5e-27,"Unit":"C"}
{"Quantity":"elementary charge over h","Value":241798934800000,"Uncertainty":5300000,"Unit":"A J^-1"}
{"Quantity":"Faraday constant","Value":96485.3365,"Uncertainty":0.0021,"Unit":"C mol^-1"}
{"Quantity":"Faraday constant for conventional electric current","Value":96485.3321,"Uncertainty":0.0043,"Unit":"C_90 mol^-1"}
{"Quantity":"Fermi coupling constant","Value":0.00001,"Uncertainty":5e-11,"Unit":"GeV^-2"}
{"Quantity":"fine-structure constant","Value":0.0073,"Uncertainty":2.4e-12,"Unit":""}
{"Quantity":"first radiation constant","Value":3.74177e-16,"Uncertainty":1.7e-23,"Unit":"W m^2"}
{"Quantity":"first radiation constant for spectral radiance","Value":1.19104e-16,"Uncertainty":5.3e-24,"Unit":"W m^2 sr^-1"}
{"Quantity":"hartree-atomic mass unit relationship","Value":2.92126e-08,"Uncertainty":2.1e-17,"Unit":"u"}
{"Quantity":"hartree-electron volt relationship","Value":27.21139,"Uncertainty":6e-07,"Unit":"eV"}
{"Quantity":"Hartree energy","Value":4.35974e-18,"Uncertainty":1.9e-25,"Unit":"J"}
{"Quantity":"Hartree energy in eV","Value":27.21139,"Uncertainty":6e-07,"Unit":"eV"}
{"Quantity":"hartree-hertz relationship","Value":6579683920729000,"Uncertainty":33000,"Unit":"Hz"}
{"Quantity":"hartree-inverse meter relationship","Value":21947463.13708,"Uncertainty":0.00011,"Unit":"m^-1"}
{"Quantity":"hartree-joule relationship","Value":4.35974e-18,"Uncertainty":1.9e-25,"Unit":"J"}
{"Quantity":"hartree-kelvin relationship","Value":315775.04,"Uncertainty":0.29,"Unit":"K"}
{"Quantity":"hartree-kilogram relationship","Value":4.85087e-35,"Uncertainty":2.1e-42,"Unit":"kg"}
{"Quantity":"helion-electron mass ratio","Value":5495.88528,"Uncertainty":5e-06,"Unit":""}
{"Quantity":"helion g factor","Value":-4.25525,"Uncertainty":5e-08,"Unit":""}
{"Quantity":"helion mag. mom.","Value":-1.07462e-26,"Uncertainty":2.7e-34,"Unit":"J T^-1"}
{"Quantity":"helion mag. mom. to Bohr magneton ratio","Value":-0.00116,"Uncertainty":1.4e-11,"Unit":""}
{"Quantity":"helion mag. mom. to nuclear magneton ratio","Value":-2.12763,"Uncertainty":2.5e-08,"Unit":""}
{"Quantity":"helion mass","Value":5.00641e-27,"Uncertainty":2.2e-34,"Unit":"kg"}
{"Quantity":"helion mass energy equivalent","Value":4.49954e-10,"Uncertainty":2e-17,"Unit":"J"}
{"Quantity":"helion mass energy equivalent in MeV","Value":2808.39148,"Uncertainty":0.00006,"Unit":"MeV"}
{"Quantity":"helion mass in u","Value":3.01493,"Uncertainty":2.5e-09,"Unit":"u"}
{"Quantity":"helion molar mass","Value":0.00301,"Uncertainty":2.5e-12,"Unit":"kg mol^-1"}
{"Quantity":"helion-proton mass ratio","Value":2.99315,"Uncertainty":2.5e-09,"Unit":""}
{"Quantity":"hertz-atomic mass unit relationship","Value":4.43982e-24,"Uncertainty":3.1e-33,"Unit":"u"}
{"Quantity":"hertz-electron volt relationship","Value":4.13567e-15,"Uncertainty":9.1e-23,"Unit":"eV"}
{"Quantity":"hertz-hartree relationship","Value":1.51983e-16,"Uncertainty":7.6e-28,"Unit":"E_h"}
{"Quantity":"hertz-inverse meter relationship","Value":3.33564e-09,"Unit":"m^-1"}
{"Quantity":"hertz-joule relationship","Value":6.62607e-34,"Uncertainty":2.9e-41,"Unit":"J"}
{"Quantity":"hertz-kelvin relationship","Value":4.79924e-11,"Uncertainty":4.4e-17,"Unit":"K"}
{"Quantity":"hertz-kilogram relationship","Value":7.3725e-51,"Uncertainty":3.3e-58,"Unit":"kg"}
{"Quantity":"inverse fine-structure constant","Value":137.036,"Uncertainty":4.4e-08,"Unit":""}
{"Quantity":"inverse meter-atomic mass unit relationship","Value":1.33103e-15,"Uncertainty":9.4e-25,"Unit":"u"}
{"Quantity":"inverse meter-electron volt relationship","Value":1.23984e-06,"Uncertainty":2.7e-14,"Unit":"eV"}
{"Quantity":"inverse meter-hartree relationship","Value":4.55634e-08,"Uncertainty":2.3e-19,"Unit":"E_h"}
{"Quantity":"inverse meter-hertz relationship","Value":299792458,"Unit":"Hz"}
{"Quantity":"inverse meter-joule relationship","Value":1.98645e-25,"Uncertainty":8.8e-33,"Unit":"J"}
{"Quantity":"inverse meter-kelvin relationship","Value":0.01439,"Uncertainty":1.3e-08,"Unit":"K"}
{"Quantity":"inverse meter-kilogram relationship","Value":2.21022e-42,"Uncertainty":9.8e-50,"Unit":"kg"}
{"Quantity":"inverse of conductance quantum","Value":12906.40372,"Uncertainty":4.2e-06,"Unit":"ohm"}
{"Quantity":"Josephson constant","Value":483597870000000,"Uncertainty":11000000,"Unit":"Hz V^-1"}
{"Quantity":"joule-atomic mass unit relationship","Value":6700535850,"Uncertainty":300,"Unit":"u"}
{"Quantity":"joule-electron volt relationship","Value":6.24150934e+18,"Uncertainty":140000000000,"Unit":"eV"}
{"Quantity":"joule-hartree relationship","Value":2.29371248e+17,"Uncertainty":10000000000,"Unit":"E_h"}
{"Quantity":"joule-hertz relationship","Value":1.509190311e+33,"Uncertainty":6.7000000000000004e+25,"Unit":"Hz"}
{"Quantity":"joule-inverse meter relationship","Value":5.0341170100000004e+24,"Uncertainty":2.2e+17,"Unit":"m^-1"}
{"Quantity":"joule-kelvin relationship","Value":7.2429716000000004e+22,"Uncertainty":66000000000000000,"Unit":"K"}
{"Quantity":"joule-kilogram relationship","Value":1.11265e-17,"Unit":"kg"}
{"Quantity":"kelvin-atomic mass unit relationship","Value":9.25109e-14,"Uncertainty":8.4e-20,"Unit":"u"}
{"Quantity":"kelvin-electron volt relationship","Value":0.00009,"Uncertainty":7.8e-11,"Unit":"eV"}
{"Quantity":"kelvin-hartree relationship","Value":3.16681e-06,"Uncertainty":2.9e-12,"Unit":"E_h"}
{"Quantity":"kelvin-hertz relationship","Value":20836618000,"Uncertainty":19000,"Unit":"Hz"}
{"Quantity":"kelvin-inverse meter relationship","Value":69.50348,"Uncertainty":0.00006,"Unit":"m^-1"}
{"Quantity":"kelvin-joule relationship","Value":1.38065e-23,"Uncertainty":1.3e-29,"Unit":"J"}
{"Quantity":"kelvin-kilogram relationship","Value":1.53618e-40,"Uncertainty":1.4e-46,"Unit":"kg"}
{"Quantity":"kilogram-atomic mass unit relationship","Value":6.0221412900000002e+26,"Uncertainty":2.7e+19,"Unit":"u"}
{"Quantity":"kilogram-electron volt relationship","Value":5.6095888499999999e+35,"Uncertainty":1.1999999999999999e+28,"Unit":"eV"}
{"Quantity":"kilogram-hartree relationship","Value":2.0614859679999999e+34,"Uncertainty":9.1000000000000006e+26,"Unit":"E_h"}
{"Quantity":"kilogram-hertz relationship","Value":1.3563926080000001e+50,"Uncertainty":6.0000000000000006e+42,"Unit":"Hz"}
{"Quantity":"kilogram-inverse meter relationship","Value":4.5244387300000003e+41,"Uncertainty":1.9999999999999999e+34,"Unit":"m^-1"}
{"Quantity":"kilogram-joule relationship","Value":89875517870000000,"Unit":"J"}
{"Quantity":"kilogram-kelvin relationship","Value":6.5096582000000006e+39,"Uncertainty":5.9000000000000001e+33,"Unit":"K"}
{"Quantity":"lattice parameter of silicon","Value":5.43102e-10,"Uncertainty":8.9e-18,"Unit":"m"}
{"Quantity":"Loschmidt constant (273.15 K, 100 kPa)","Value":2.6516461999999999e+25,"Uncertainty":2.4e+19,"Unit":"m^-3"}
{"Quantity":"Loschmidt constant (273.15 K, 101.325 kPa)","Value":2.6867805000000001e+25,"Uncertainty":2.4e+19,"Unit":"m^-3"}
{"Quantity":"mag. constant","Value":1.25664e-06,"Unit":"N A^-2"}
{"Quantity":"mag. flux quantum","Value":2.06783e-15,"Uncertainty":4.6e-23,"Unit":"Wb"}
{"Quantity":"molar gas constant","Value":8.31446,"Uncertainty":7.5e-06,"Unit":"J mol^-1 K^-1"}
{"Quantity":"molar mass constant","Value":0.001,"Unit":"kg mol^-1"}
{"Quantity":"molar mass of carbon-12","Value":0.012,"Unit":"kg mol^-1"}
{"Quantity":"molar Planck constant","Value":3.99031e-10,"Uncertainty":2.8e-19,"Unit":"J s mol^-1"}
{"Quantity":"molar Planck constant times c","Value":0.11963,"Uncertainty":8.4e-11,"Unit":"J m mol^-1"}
{"Quantity":"molar volume of ideal gas (273.15 K, 100 kPa)","Value":0.02271,"Uncertainty":2.1e-08,"Unit":"m^3 mol^-1"}
{"Quantity":"molar volume of ideal gas (273.15 K, 101.325 kPa)","Value":0.02241,"Uncertainty":2e-08,"Unit":"m^3 mol^-1"}
{"Quantity":"molar volume of silicon","Value":0.00001,"Uncertainty":8e-13,"Unit":"m^3 mol^-1"}
{"Quantity":"Mo x unit","Value":1.0021e-13,"Uncertainty":5.3e-20,"Unit":"m"}
{"Quantity":"muon Compton wavelength","Value":1.17344e-14,"Uncertainty":3e-22,"Unit":"m"}
{"Quantity":"muon Compton wavelength over 2 pi","Value":1.86759e-15,"Uncertainty":4.7e-23,"Unit":"m"}
{"Quantity":"muon-electron mass ratio","Value":206.76828,"Uncertainty":5.2e-06,"Unit":""}
{"Quantity":"muon g factor","Value":-2.00233,"Uncertainty":1.3e-09,"Unit":""}
{"Quantity":"muon mag. mom.","Value":-4.49045e-26,"Uncertainty":1.5e-33,"Unit":"J T^-1"}
{"Quantity":"muon mag. mom. anomaly","Value":0.00117,"Uncertainty":6.3e-10,"Unit":""}
{"Quantity":"muon mag. mom. to Bohr magneton ratio","Value":-0.00484,"Uncertainty":1.2e-10,"Unit":""}
{"Quantity":"muon mag. mom. to nuclear magneton ratio","Value":-8.8906,"Uncertainty":2.2e-07,"Unit":""}
{"Quantity":"muon mass","Value":1.88353e-28,"Uncertainty":9.6e-36,"Unit":"kg"}
{"Quantity":"muon mass energy equivalent","Value":1.69283e-11,"Uncertainty":8.6e-19,"Unit":"J"}
{"Quantity":"muon mass energy equivalent in MeV","Value":105.65837,"Uncertainty":3.5e-06,"Unit":"MeV"}
{"Quantity":"muon mass in u","Value":0.11343,"Uncertainty":2.9e-09,"Unit":"u"}
{"Quantity":"muon molar mass","Value":0.00011,"Uncertainty":2.9e-12,"Unit":"kg mol^-1"}
{"Quantity":"muon-neutron mass ratio","Value":0.11245,"Uncertainty":2.8e-09,"Unit":""}
{"Quantity":"muon-proton mag. mom. ratio","Value":-3.18335,"Uncertainty":8.4e-08,"Unit":""}
{"Quantity":"muon-proton mass ratio","Value":0.11261,"Uncertainty":2.8e-09,"Unit":""}
{"Quantity":"muon-tau mass ratio","Value":0.05946,"Uncertainty":5.4e-06,"Unit":""}
{"Quantity":"natural unit of action","Value":1.05457e-34,"Uncertainty":4.7e-42,"Unit":"J s"}
{"Quantity":"natural unit of action in eV s","Value":6.58212e-16,"Uncertainty":1.5e-23,"Unit":"eV s"}
{"Quantity":"natural unit of energy","Value":8.18711e-14,"Uncertainty":3.6e-21,"Unit":"J"}
{"Quantity":"natural unit of energy in MeV","Value":0.511,"Uncertainty":1.1e-08,"Unit":"MeV"}
{"Quantity":"natural unit of length","Value":3.86159e-13,"Uncertainty":2.5e-22,"Unit":"m"}
{"Quantity":"natural unit of mass","Value":9.10938e-31,"Uncertainty":4e-38,"Unit":"kg"}
{"Quantity":"natural unit of mom.um","Value":2.73092e-22,"Uncertainty":1.2e-29,"Unit":"kg m s^-1"}
{"Quantity":"natural unit of mom.um in MeV/c","Value":0.511,"Uncertainty":1.1e-08,"Unit":"MeV/c"}
{"Quantity":"natural unit of time","Value":1.28809e-21,"Uncertainty":8.3e-31,"Unit":"s"}
{"Quantity":"natural unit of velocity","Value":299792458,"Unit":"m s^-1"}
{"Quantity":"neutron Compton wavelength","Value":1.31959e-15,"Uncertainty":1.1e-24,"Unit":"m"}
{"Quantity":"neutron Compton wavelength over 2 pi","Value":2.10019e-16,"Uncertainty":1.7e-25,"Unit":"m"}
{"Quantity":"neutron-electron mag. mom. ratio","Value":0.00104,"Uncertainty":2.5e-10,"Unit":""}
{"Quantity":"neutron-electron mass ratio","Value":1838.68366,"Uncertainty":1.1e-06,"Unit":""}
{"Quantity":"neutron g factor","Value":-3.82609,"Uncertainty":9e-07,"Unit":""}
{"Quantity":"neutron gyromag. ratio","Value":183247179,"Uncertainty":43,"Unit":"s^-1 T^-1"}
{"Quantity":"neutron gyromag. ratio over 2 pi","Value":29.16469,"Uncertainty":6.9e-06,"Unit":"MHz T^-1"}
{"Quantity":"neutron mag. mom.","Value":-9.66236e-27,"Uncertainty":2.3e-33,"Unit":"J T^-1"}
{"Quantity":"neutron mag. mom. to Bohr magneton ratio","Value":-0.00104,"Uncertainty":2.5e-10,"Unit":""}
{"Quantity":"neutron mag. mom. to nuclear magneton ratio","Value":-1.91304,"Uncertainty":4.5e-07,"Unit":""}
{"Quantity":"neutron mass","Value":1.67493e-27,"Uncertainty":7.4e-35,"Unit":"kg"}
{"Quantity":"neutron mass energy equivalent","Value":1.50535e-10,"Uncertainty":6.6e-18,"Unit":"J"}
{"Quantity":"neutron mass energy equivalent in MeV","Value":939.56538,"Uncertainty":0.00002,"Unit":"MeV"}
{"Quantity":"neutron mass in u","Value":1.00866,"Uncertainty":4.3e-10,"Unit":"u"}
{"Quantity":"neutron molar mass","Value":0.00101,"Uncertainty":4.3e-13,"Unit":"kg mol^-1"}
{"Quantity":"neutron-muon mass ratio","Value":8.89248,"Uncertainty":2.2e-07,"Unit":""}
{"Quantity":"neutron-proton mag. mom. ratio","Value":-0.68498,"Uncertainty":1.6e-07,"Unit":""}
{"Quantity":"neutron-proton mass difference","Value":2.30557e-30,"Uncertainty":7.6e-37,"Unit":""}
{"Quantity":"neutron-proton mass difference energy equivalent","Value":2.07215e-13,"Uncertainty":6.8e-20,"Unit":""}
{"Quantity":"neutron-proton mass difference energy equivalent in MeV","Value":1.29333,"Uncertainty":4.2e-07,"Unit":""}
{"Quantity":"neutron-proton mass difference in u","Value":0.00139,"Uncertainty":4.5e-10,"Unit":""}
{"Quantity":"neutron-proton mass ratio","Value":1.00138,"Uncertainty":4.5e-10,"Unit":""}
{"Quantity":"neutron-tau mass ratio","Value":0.52879,"Uncertainty":0.00005,"Unit":""}
{"Quantity":"neutron to shielded proton mag. mom. ratio","Value":-0.685,"Uncertainty":1.6e-07,"Unit":""}
{"Quantity":"Newtonian constant of gravitation","Value":6.67384e-11,"Uncertainty":8e-15,"Unit":"m^3 kg^-1 s^-2"}
{"Quantity":"Newtonian constant of gravitation over h-bar c","Value":6.70837e-39,"Uncertainty":8e-43,"Unit":"(GeV/c^2)^-2"}
{"Quantity":"nuclear magneton","Value":5.05078e-27,"Uncertainty":1.1e-34,"Unit":"J T^-1"}
{"Quantity":"nuclear magneton in eV/T","Value":3.15245e-08,"Uncertainty":2.2e-17,"Unit":"eV T^-1"}
{"Quantity":"nuclear magneton in inverse meters per tesla","Value":0.02543,"Uncertainty":5.6e-10,"Unit":"m^-1 T^-1"}
{"Quantity":"nuclear magneton in K/T","Value":0.00037,"Uncertainty":3.3e-10,"Unit":"K T^-1"}
{"Quantity":"nuclear magneton in MHz/T","Value":7.62259,"Uncertainty":1.7e-07,"Unit":"MHz T^-1"}
{"Quantity":"Planck constant","Value":6.62607e-34,"Uncertainty":2.9e-41,"Unit":"J s"}
{"Quantity":"Planck constant in eV s","Value":4.13567e-15,"Uncertainty":9.1e-23,"Unit":"eV s"}
{"Quantity":"Planck constant over 2 pi","Value":1.05457e-34,"Uncertainty":4.7e-42,"Unit":"J s"}
{"Quantity":"Planck constant over 2 pi in eV s","Value":6.58212e-16,"Uncertainty":1.5e-23,"Unit":"eV s"}
{"Quantity":"Planck constant over 2 pi times c in MeV fm","Value":197.32697,"Uncertainty":4.4e-06,"Unit":"MeV fm"}
{"Quantity":"Planck length","Value":1.6162e-35,"Uncertainty":9.7e-40,"Unit":"m"}
{"Quantity":"Planck mass","Value":2.17651e-08,"Uncertainty":1.3e-12,"Unit":"kg"}
{"Quantity":"Planck mass energy equivalent in GeV","Value":1.220932e+19,"Uncertainty":730000000000000,"Unit":"GeV"}
{"Quantity":"Planck temperature","Value":1.416833e+32,"Uncertainty":8.5e+27,"Unit":"K"}
{"Quantity":"Planck time","Value":5.39106e-44,"Uncertainty":3.2e-48,"Unit":"s"}
{"Quantity":"proton charge to mass quotient","Value":95788335.8,"Uncertainty":2.1,"Unit":"C kg^-1"}
{"Quantity":"proton Compton wavelength","Value":1.32141e-15,"Uncertainty":9.4e-25,"Unit":"m"}
{"Quantity":"proton Compton wavelength over 2 pi","Value":2.10309e-16,"Uncertainty":1.5e-25,"Unit":"m"}
{"Quantity":"proton-electron mass ratio","Value":1836.15267,"Uncertainty":7.5e-07,"Unit":""}
{"Quantity":"proton g factor","Value":5.58569,"Uncertainty":4.6e-08,"Unit":""}
{"Quantity":"proton gyromag. ratio","Value":267522200.5,"Uncertainty":6.3,"Unit":"s^-1 T^-1"}
{"Quantity":"proton gyromag. ratio over 2 pi","Value":42.57748,"Uncertainty":1e-06,"Unit":"MHz T^-1"}
{"Quantity":"proton mag. mom.","Value":1.41061e-26,"Uncertainty":3.3e-34,"Unit":"J T^-1"}
{"Quantity":"proton mag. mom. to Bohr magneton ratio","Value":0.00152,"Uncertainty":1.2e-11,"Unit":""}
{"Quantity":"proton mag. mom. to nuclear magneton ratio","Value":2.79285,"Uncertainty":2.3e-08,"Unit":""}
{"Quantity":"proton mag. shielding correction","Value":0.00003,"Uncertainty":1.4e-08,"Unit":""}
{"Quantity":"proton mass","Value":1.67262e-27,"Uncertainty":7.4e-35,"Unit":"kg"}
{"Quantity":"proton mass energy equivalent","Value":1.50328e-10,"Uncertainty":6.6e-18,"Unit":"J"}
{"Quantity":"proton mass energy equivalent in MeV","Value":938.27205,"Uncertainty":0.00002,"Unit":"MeV"}
{"Quantity":"proton mass in u","Value":1.00728,"Uncertainty":9e-11,"Unit":"u"}
{"Quantity":"proton molar mass","Value":0.00101,"Uncertainty":9e-14,"Unit":"kg mol^-1"}
{"Quantity":"proton-muon mass ratio","Value":8.88024,"Uncertainty":2.2e-07,"Unit":""}
{"Quantity":"proton-neutron mag. mom. ratio","Value":-1.4599,"Uncertainty":3.4e-07,"Unit":""}
{"Quantity":"proton-neutron mass ratio","Value":0.99862,"Uncertainty":4.5e-10,"Unit":""}
{"Quantity":"proton rms charge radius","Value":8.775e-16,"Uncertainty":5.1e-18,"Unit":"m"}
{"Quantity":"proton-tau mass ratio","Value":0.52806,"Uncertainty":0.00005,"Unit":""}
{"Quantity":"quantum of circulation","Value":0.00036,"Uncertainty":2.4e-13,"Unit":"m^2 s^-1"}
{"Quantity":"quantum of circulation times 2","Value":0.00073,"Uncertainty":4.7e-13,"Unit":"m^2 s^-1"}
{"Quantity":"Rydberg constant","Value":10973731.56854,"Uncertainty":0.00006,"Unit":"m^-1"}
{"Quantity":"Rydberg constant times c in Hz","Value":3289841960364000,"Uncertainty":17000,"Unit":"Hz"}
{"Quantity":"Rydberg constant times hc in eV","Value":13.60569,"Uncertainty":3e-07,"Unit":"eV"}
{"Quantity":"Rydberg constant times hc in J","Value":2.17987e-18,"Uncertainty":9.6e-26,"Unit":"J"}
{"Quantity":"Sackur-Tetrode constant (1 K, 100 kPa)","Value":-1.15171,"Uncertainty":2.3e-06,"Unit":""}
{"Quantity":"Sackur-Tetrode constant (1 K, 101.325 kPa)","Value":-1.16487,"Uncertainty":2.3e-06,"Unit":""}
{"Quantity":"second radiation constant","Value":0.01439,"Uncertainty":1.3e-08,"Unit":"m K"}
{"Quantity":"shielded helion gyromag. ratio","Value":203789465.9,"Uncertainty":5.1,"Unit":"s^-1 T^-1"}
{"Quantity":"shielded helion gyromag. ratio over 2 pi","Value":32.4341,"Uncertainty":8.1e-07,"Unit":"MHz T^-1"}
{"Quantity":"shielded helion mag. mom.","Value":-1.07455e-26,"Uncertainty":2.7e-34,"Unit":"J T^-1"}
{"Quantity":"shielded helion mag. mom. to Bohr magneton ratio","Value":-0.00116,"Uncertainty":1.4e-11,"Unit":""}
{"Quantity":"shielded helion mag. mom. to nuclear magneton ratio","Value":-2.1275,"Uncertainty":2.5e-08,"Unit":""}
{"Quantity":"shielded helion to proton mag. mom. ratio","Value":-0.76177,"Uncertainty":1.1e-08,"Unit":""}
{"Quantity":"shielded helion to shielded proton mag. mom. ratio","Value":-0.76179,"Uncertainty":3.3e-09,"Unit":""}
{"Quantity":"shielded proton gyromag. ratio","Value":267515326.8,"Uncertainty":6.6,"Unit":"s^-1 T^-1"}
{"Quantity":"shielded proton gyromag. ratio over 2 pi","Value":42.57639,"Uncertainty":1e-06,"Unit":"MHz T^-1"}
{"Quantity":"shielded proton mag. mom.","Value":1.41057e-26,"Uncertainty":3.5e-34,"Unit":"J T^-1"}
{"Quantity":"shielded proton mag. mom. to Bohr magneton ratio","Value":0.00152,"Uncertainty":1.7e-11,"Unit":""}
{"Quantity":"shielded proton mag. mom. to nuclear magneton ratio","Value":2.79278,"Uncertainty":3e-08,"Unit":""}
{"Quantity":"speed of light in vacuum","Value":299792458,"Unit":"m s^-1"}
{"Quantity":"standard acceleration of gravity","Value":9.80665,"Unit":"m s^-2"}
{"Quantity":"standard atmosphere","Value":101325,"Unit":"Pa"}
{"Quantity":"standard-state pressure","Value":100000,"Unit":"Pa"}
{"Quantity":"Stefan-Boltzmann constant","Value":5.67037e-08,"Uncertainty":2.1e-13,"Unit":"W m^-2 K^-4"}
{"Quantity":"tau Compton wavelength","Value":6.97787e-16,"Uncertainty":6.3e-20,"Unit":"m"}
{"Quantity":"tau Compton wavelength over 2 pi","Value":1.11056e-16,"Uncertainty":1e-20,"Unit":"m"}
{"Quantity":"tau-electron mass ratio","Value":3477.15,"Uncertainty":0.31,"Unit":""}
{"Quantity":"tau mass","Value":3.16747e-27,"Uncertainty":2.9e-31,"Unit":"kg"}
{"Quantity":"tau mass energy equivalent","Value":2.84678e-10,"Uncertainty":2.6e-14,"Unit":"J"}
{"Quantity":"tau mass energy equivalent in MeV","Value":1776.82,"Uncertainty":0.16,"Unit":"MeV"}
{"Quantity":"tau mass in u","Value":1.90749,"Uncertainty":0.00017,"Unit":"u"}
{"Quantity":"tau molar mass","Value":0.00191,"Uncertainty":1.7e-07,"Unit":"kg mol^-1"}
{"Quantity":"tau-muon mass ratio","Value":16.8167,"Uncertainty":0.0015,"Unit":""}
{"Quantity":"tau-neutron mass ratio","Value":1.89111,"Uncertainty":0.00017,"Unit":""}
{"Quantity":"tau-proton mass ratio","Value":1.89372,"Uncertainty":0.00017,"Unit":""}
{"Quantity":"Thomson cross section","Value":6.65246e-29,"Uncertainty":1.3e-37,"Unit":"m^2"}
{"Quantity":"triton-electron mass ratio","Value":5496.92153,"Uncertainty":5e-06,"Unit":""}
{"Quantity":"triton g factor","Value":5.95792,"Uncertainty":7.6e-08,"Unit":""}
{"Quantity":"triton mag. mom.","Value":1.50461e-26,"Uncertainty":3.8e-34,"Unit":"J T^-1"}
{"Quantity":"triton mag. mom. to Bohr magneton ratio","Value":0.00162,"Uncertainty":2.1e-11,"Unit":""}
{"Quantity":"triton mag. mom. to nuclear magneton ratio","Value":2.97896,"Uncertainty":3.8e-08,"Unit":""}
{"Quantity":"triton mass","Value":5.00736e-27,"Uncertainty":2.2e-34,"Unit":"kg"}
{"Quantity":"triton mass energy equivalent","Value":4.50039e-10,"Uncertainty":2e-17,"Unit":"J"}
{"Quantity":"triton mass energy equivalent in MeV","Value":2808.92101,"Uncertainty":0.00006,"Unit":"MeV"}
{"Quantity":"triton mass in u","Value":3.0155,"Uncertainty":2.5e-09,"Unit":"u"}
{"Quantity":"triton molar mass","Value":0.00302,"Uncertainty":2.5e-12,"Unit":"kg mol^-1"}
{"Quantity":"triton-proton mass ratio","Value":2.99372,"Uncertainty":2.5e-09,"Unit":""}
{"Quantity":"unified atomic mass unit","Value":1.66054e-27,"Uncertainty":7.3e-35,"Unit":"kg"}
{"Quantity":"von Klitzing constant","Value":25812.80744,"Uncertainty":8.4e-06,"Unit":"ohm"}
{"Quantity":"weak mixing angle","Value":0.2223,"Uncertainty":0.0021,"Unit":""}
{"Quantity":"Wien frequency displacement law constant","Value":58789254000,"Uncertainty":53000,"Unit":"Hz K^-1"}
{"Quantity":"Wien wavelength displacement law constant","Value":0.0029,"Uncertainty":2.6e-09,"Unit":"m K"}