f(x)=

Non-zero values of x:
x=
x=
x=
x=

Constants in MKS units:

speed of light: c = 2.9979 × 10⁸ m/s

Planck's constant: h = 6.6261 × 10^-34 J·s

Planck's constant divided by 2 pi: hbar = 1.0546 × 10^-34 J·s

Charge on a proton: e = 1.6022 × 10^-19 C   esu = 4.8032 × 10^-10

Conversion constant: hbar*c/e = 197.33 MeV·fm or eV·nm = 1.9733 × 10^-7 eV·m

Electron mass: me and me2 = 9.1094 × 10^-31 kg or 0.51100 MeV/c²

Proton mass: mp and mp2 = 1.6726 × 10^-27 kg or 938.27 MeV/c²

amu mass: amu and amu2 = 1.6605 × 10^-27 kg or 931.49 MeV/c²

permittivity of free space: epsilon0 = 8.8542 × 10^-12 F/m

permeability of free space: mu0 = 1.2566 × 10^-6 N/A²

fine structure constant: alpha = 7.2974 × 10^-3

Bohr radius: a = 5.2918 × 10^-11 m

Rydberg energy: Ry and Ry2 = 2.1799 × 10^-18 J or 13.606 eV

Rydberg wavenumber constant: RH = 1.0974 × 10⁷ m^-1

Newton's gravitational constant: Gn = 6.6743 × 10^-11 m³·kg^-1·s^-2

acceleration of gravity: g = 9.8066 m/s²

Avogadro's constant: Na = 6.0221 × 10²³

Boltzmann's constant: Kb = 1.3807 × 10^-23 J/K

Wien's displacement law constant: b = 2.8978 × 10^-3 m·K

Stefan-Boltzmann constant: sigma = 5.6704 × 10^-8 W·m^-2·K^-4

parsec: pc = 3.0857 × 10¹⁶ m

light year: Ly = c*year = 9.4605 × 10¹⁵ m

Astronomical unit: AU = 1.4960 × 10¹¹ m

mass of Sun: Msun = 1.9884 × 10³⁰ kg

radius of Sun: Rsun = 6.9600 × 10⁸ m

Solar luminosity: Lsun = 3.8427 × 10²⁶ W

mass of Earth: Mearth = 5.9722 × 10²⁴ kg

radius of Earth: Rearth = 6.3781 × 10⁶ m

quantized hall "resistance": h/e^2= 2.5813 × 10⁴ Ohm

frequency of 1eV photon: e/h= 2.4180 × 10¹⁴ Hz

wavelength of 1eV photon: h*c/e= 1.2398 × 10^-6 m

Temperature for kT = 1 eV: e/kb= 1.1605 × 10⁴ K

1 eV per molecule = Na*e/4184 = 23.061 kcal/mole = Na*e/1000 = 96.485 kJ/mole

standard pressure: atm= 1.0132 × 10⁵ N/m²

gas constant: R = Na*kb = 8.3145 J/K

year: year = 3.1557 × 10⁷ seconds