NeoCal for Qtopia User Guide
Physical constants
The Constants dialog lists many common physical constants in SI units that can be recalled into the x register. Use the Preferences dialog to assign a section of the display for quicker access to this dialog.
The following constants are listed in the Constants dialog:
- Avogadro's number, NA: 6.0221367e23 gmol-1
- Boltzmann constant, k: 1.380658e-23 J/K
- Molar volume, Vm: 22.4141 l/gmol
- Universal gas constant, R: 8.31451 J/(gmol K)
- Standard temperature, StdT: 273.15 K
- Standard pressure, StdP: 101.325 kPa
- Stefan-Boltzmann constant: 5.67051e-8 W/(m2 K4)
- Speed of light in vacuum, c: 299792458 m/s
- Permittivity of vacuum: 8.85418781761e-12 F/m
- Permeability of vacuum: 1.25663706144e-6 H/m
- Acceleration of gravity, g: 9.80665 m/s2
- Gravitational constant, G: 6.67259e-11 m3/(s2 kg)
- Planck's constant, h: 6.6260755e-34 J s
- Dirac's constant, hbar: 1.05457266e-34 J s
- Electron charge, q: 1.60217733e-19 C
- Electron rest mass, me: 9.1093897e-31 kg
- q/me, qme: 175881962000 C/kg
- Proton rest mass, mp: 1.6726231e-27 kg
- mp/me, mpme: 1836.152701
- Fine structure constant: 0.00729735308
- Magnetic flux quantum: 2.06783461e-15 Wb
- Faraday constant, F: 96485.309 C/gmol
- Rydberg constant: 10973731.534 m-1
- Bohr radius, a0: 0.0529177249 nm
- Bohr magneton: 9.2740154e-24 J/T
- Nuclear magneton: 5.0507866e-27 J/T
- Photon wavelength (ch/e): 1239.8425 nm
- Photon frequency (e/h), f0: 2.4179883e14 Hz
- Compton wavelength: 0.00242631058 nm
- Wien displacement constant, c3: 0.002897756 m K
- Dielectric constant: 11.9
- SiO2 dielectric constant: 3.9
- Reference intensity, I0: 0.000000000001 W/m2
