Page 140 -
Basic HTML Version
Page 140
Stuart
®
Catalogue
Stuart
®
Catalogue
Technical Information
Physical Constants
Constant
Symbol
Value
Unit
Atomic mass unit
m
u
1.660540 . 10
-27
kg
Avogadro constant
N
A
6.022137 . 10
-23
mol
-1
Bohr magneton
µ
B
9.274015 . 10
-24
JT
-1
Bohr radius
a
o
5.291771 . 10
-11
m
Boltzmann constant
k
B
1.380662 . 10
-23
JK
-1
Compton wavelength (e)
λ
Ce
2.426311 . 10
-12
m
Compton wavelength (n)
λ
Cn
1.319591 . 10
-15
m
Compton wavelength (p)
λ
Cp
1.321410 . 10
-15
m
Electric field constant in vacuo
ε
o
8.854188 . 10
-27
Fm
-1
Electron radius
r
e
2.817941 . 10
-15
m
Elementary charge
e
1.602177 . 10
-19
C
Faraday constant
F
9.648531 . 10
4
Cmol
-1
Fine structure constant
α
7.297353 . 10
-3
Gas constant
R
8.31451
J mol
-1
K
-1
Gravitation constant
f
6.672590 . 10
-11
Nm
2
kg
-2
Intrinsic impedance
r
3.767301 . 10
2
Ω
Light velocity in vacuo
c
2.997924 . 10
8
ms
-1
Loschmidt constant
N
L
2.686763 . 10
25
m
-3
Magnetic field constant in vacuo
µ
0
1.256637 . 10
-7
Hm
-1
Molar volume of ideal gases
υ
2.445294 . 10
-2
m
3
mol
-1
298K, 101.325kPa
Normal acceleration of fall
g
9.80665
ms
-2
Planck constant
h
6.626075 . 10
-34
Js
Rest mass of the electron
m
e
9.109390 . 10
-31
kg
Rest mass of the neutron
m
n
1.674929 . 10
-27
kg
Rest mass of the proton
m
p
1.672623 . 10
-27
kg
Rational quantum
h/(2)
π
1.054588 . 10
-34
Js
Rydberg constant
R
∞
1.097373 . 10
7
m
-1
