Units Currencies
Units Home
Unit Conversion
List Units
List Categories
SI System
Base Units
Derived Units
Time / Decimal
Desktop Engineering

Design, simulation, test, prototyping and high performance computing.

Salary Expectation

8 things to know about the interview question "What's your salary expectation"?

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

more free magazines

Name Symbol Value
atomic mass constant mu 1.660539x10-27 kg
Avogadro constant NA 6.022142x1023 /mol
Bohr magneton mB 9.274009x10-24 J/T
Bohr radius a0 5.291772x10-11 m
Boltzmann constant k 1.380650x10-23 J/K
conductance quantum G0 7.748092x10-5 S
electric permittivity constant e0 1/(m0·c2) = 8.85418781...x10-12 F/m
electron Compton wavelength lc 2.426310x10-12 m
electron magnetic moment me 9.284764x10-24
electron radius (classical) re 2.817940x10-15 m
electron rest mass me 9.109382x10-31 kg
electron volt eV 1.602176x10-19 J
elementary charge e 1.602176x10-19 C
Euler's constant g 0.577215664901532...
Faraday constant F 9.648524x104 C/mol
fine-structure constant a 7.297353x10-3
first radiation constant c1 3.741771x10-16 W/m2
golden ratio f 1.618033988749894...
gravitational constant G 6.6732x10-11 N-m2/kg2
Josephson constant KJ 4.835979x1014 Hz/V
magnetic flux quantum F0 2.067834x10-15 Wb
magnetic permeability constant m0 4p x10-7 = 1.2566370614...x10-6 H/m
natural log base e 2.718281828459045...
neutron magnetic moment mn 9.662364x10-27 J/T
neutron rest mass mn 1.674927x10-27 kg
nuclear magneton mN 5.050783x10-27 J/T
pi p 3.14159265358979323846264...
Planck constant h 6.626069x10-34 J-s
proton Compton wavelength lc,p 1.321410x10-15 m
proton magnetic moment mp 1.410607x10-26 J/T
proton rest mass mp 1.672622x10-27 kg
Rydberg constant 1.097373x107 /m
second radiation constant c2 1.438775x10-2 m-K
speed of light in vacuum c 2.99792458x108 m/s
standard volume of ideal gas V0 2.24136x10-2 m3/mol
Stefan-Boltzmann constant s 5.670400x10-8 W/m2-K4
universal gas constant R 8.314472 J/mol-K
Wien displacement law constant b 2.897769x10-3 m-K