- Acceleration Due to Gravity [Earth], g0:
9.81 m/s2 = 32.2 ft/s2
- Air, density @ 0°C, 760mm Hg:
1.29274 kg/m3
- Atomic mass unit, unified, u:
1.66053873 x 10-27 kg
- Astronomical Unit, AU:
149.59787 x 106 km
- Atomic mass constant, unified, mu:
1.66053873 x 10-27 kg
- Atomic specific heat constant, h/k:
4.799215664 x 10-11 sec K-1
- Avagadro constant, NA:
6.02214199 x 1023 mol-1
- Barn cross section, a0:
10-28 m2
- Bohr Magneton, µB:
9.27400899 x 10-24 J T-1
- Bohr radius, a0:
5.291772x10-11 m
- Boltzmann constant, k:
1.3806503 x 10-23 J K-1
- Classical electron radius, re:
2.817940285 x 10-15 m
- Compton wavelength, λc:
2.426310215 x 10-12 m
- Earth, equatorial radius:
6378.137 km = 3963.16 mi
- Earth, polar radius:
6356.752 km = 3949.90 mi
- Earth, mass, M:
5.9736 x 1024 kg = 6.585 x 1021 tons
- Earth, mean density:
344.3 lb/ft3 = 5515 kg/m3
- Electric field constant, ε0:
8.854187817 x 10-12F m-1
- Electronic, Atomic mass, Nm:
5.485794249 x 10-4 u
- Electron charge to mass ratio, -e/mθ:
-1.758820174 x 1011C kg-1
- Electron, magnetic moment, µe:
-9.28476362 x 10-24 J T-1
- Electron mass, me:
9.10938288 x 10-31 kg
- Electron volt, eV:
1.60217215 x 10-19J
- Elementary charge, e:
1.602176462 x 10-19 C
- Euler's constant, ϒ:
0.577215664901532860606
- Gas constant, Universal, R:
8.314510 J K-1mol-1
- Gas constant, Universal, R:
8.20578 x 10-2 l atm/K mole
- Gas constant, Universal, R:
1545.33 lbf ft / lb mole °R
- Golden Ratio, Φ:
1.61803398874...
- Gravitational Constant, G:
6.6732x10-11 N-m2/kg2
- Impedance of free space, Z0:
376.731 ohms
- Lodchmidt's constant, n0:
2.6867775 x 1025 m-3
- Magnetic field constant, µ0:
1.2566370614 x 10-8 N A-2
- Mercury, density at 0°C:
1.359508 x 104 kg/m3
- Natural Log, e:
2.718281828459045...
- Neutron mass, mn:
1.67492716 x -27 kg
- Normal Atmospheric Pressure:
101,325 N/m2
- Parsec, pc:
2.062648 x 105 AU
- Permeability of free space, µ0:
12.566370614 x 10-7 N A-2
- Permittivity of free space, ε0:
8.854187817 x 10-12 F/m
- Pi, π:
3.14159265358979323846264...
- Plank constant, h:
6.62606876 x 10-34 Js
- Sound, velocity in dry air, @ 0°C:
331.45 m/sec = 1087.4 ft/sec = 741.4 mph
- Speed of Light (in vacuum), c0:
2.998 x 108 m/s