How many universal constants are there?

Question

ex. g, G, avogadros number, c , etc

Answer 1

That's a really good question. Just when we thought we knew, there goes another. There are theories like VSL which say that the speed of light changed in the earliest instants after the Big Bang. When we thought mass and distance were constant, along came special relativity. By the time we're done, I wouldn't be surprised to find the gravitational constant G a function of something else. Several of the 'constants' are derived from the speed of light, so if that changed, those 'constants' probably changed also.

Answer 2

There are 10 Universal Physics constants:
characteristic impedance of vacuum
electric constant
magnetic constant
Newtonian constant of gravitation
Planck constant
Planck length
Planck mass
Planck temperature
Planck time
speed of light in vacuum

Answer 3

Table of universal constants
Quantity Symbol Value Relative Standard Uncertainty
characteristic impedance of vacuum 376.730 313 461... Ω defined
electric constant (permittivity of free space) 8.854 187 817... × 10-12F·m-1 defined
magnetic constant (permeability of free space) 4π × 10-7 N·A-2 = 1.2566 370 614... × 10-6 N·A-2 defined
Newtonian constant of gravitation 6.6742(10) × 10-11m3·kg-1·s-2 1.5 × 10-4
Planck's constant 6.626 0693(11) × 10-34 J·s 1.7 × 10-7
Dirac's constant 1.054 571 68(18) × 10-34 J·s 1.7 × 10-7
speed of light in vacuum 299 792 458 m·s-1 defined
[edit]
Table of electromagnetic constants
Quantity Symbol Value1 (SI units) Relative Standard Uncertainty
Bohr magneton 927.400 949(80) × 10-26 J·T-1 8.6 × 10-8
conductance quantum 7.748 091 733(26) × 10-5 S 3.3 × 10-9
Coulomb's constant 8.987 742 438 × 109 N·m2C-2 defined
elementary charge 1.602 176 53(14) × 10-19 C 8.5 × 10-8
Josephson constant 483 597.879(41) × 109 Hz· V-1 8.5 × 10-8
magnetic flux quantum 2.067 833 72(18) × 10-15 Wb 8.5 × 10-8
nuclear magneton 5.050 783 43(43) × 10-27 J·T-1 8.6 × 10-8
resistance quantum 12 906.403 725(43) Ω 3.3 × 10-9
von Klitzing constant 25 812.807 449(86) Ω 3.3 × 10-9
[edit]
Table of atomic and nuclear constants
Quantity Symbol Value1 (SI units) Relative Standard Uncertainty
Bohr radius 0.529 177 2108(18) × 10-10 m 3.3 × 10-9
Fermi coupling constant 1.166 39(1) × 10-5 GeV-2 8.6 × 10-6
fine-structure constant 7.297 352 568(24) × 10-3 3.3 × 10-9
Hartree energy 4.359 744 17(75) × 10-18 J 1.7 × 10-7
quantum of circulation 3.636 947 550(24) × 10-4 m2 s-1 6.7 × 10-9
Rydberg constant 10 973 731.568 525(73) m-1 6.6 × 10-12
Thomson cross section 0.665 245 873(13) × 10-28 m2 2.0 × 10-8
weak mixing angle 0.222 15(76) 3.4 × 10-3
[edit]
Table of physico-chemical constants
Quantity Symbol Value1 (SI units) Relative Standard Uncertainty
atomic mass unit (unified atomic mass unit) 1.660 538 86(28) × 10-27 kg 1.7 × 10-7
Avogadro's number 6.022 1415(10) × 1023 1.7 × 10-7
Boltzmann constant 1.380 6505(24) × 10-23 J·K-1 1.8 × 10-6
Faraday constant 96 485.3383(83)C·mol-1 8.6 × 10-8
first radiation constant 3.741 771 38(64) × 10-16 W·m2 1.7 × 10-7
for spectral radiance 1.191 042 82(20) × 10-16 W · m2 sr-1 1.7 × 10-7
Loschmidt constant at T=273.15 K and p=101.325 kPa 2.686 7773(47) × 1025 m-3 1.8 × 10-6
gas constant 8.314 472(15) J·K-1·mol-1 1.7 × 10-6
molar Planck constant 3.990 312 716(27) × 10-10 J · s · mol-1 6.7 × 10-9
molar volume of an ideal gas at T=273.15 K and p=100 kPa 22.710 981(40) × 10-3 m3 ·mol-1 1.7 × 10-6
at T=273.15 K and p=101.325 kPa 22.413 996(39) × 10-3 m3 ·mol-1 1.7 × 10-6
Sackur-Tetrode constant at T=1 K and p=100 kPa
-1.151 7047(44) 3.8 × 10-6
at T=1 K and p=101.325 kPa -1.164 8677(44) 3.8 × 10-6
second radiation constant 1.438 7752(25) × 10-2 m·K 1.7 × 10-6
Stefan-Boltzmann constant 5.670 400(40) × 10-8 W·m-2·K-4 7.0 × 10-6
Wien displacement law constant 4.965 114 231... 2.897 7685(51) × 10-3 m · K 1.7 × 10-6
[edit]
Table of adopted values
Quantity Symbol Value (SI units) Relative Standard Uncertainty
conventional value of Josephson constant2 483 597.9 × 109 Hz · V-1 defined
conventional value of von Klitzing constant3 25 812.807 Ω defined
molar mass constant 1 × 10-3 kg · mol-1 defined
of carbon-12 12 × 10-3 kg · mol−1 defined
standard acceleration of gravity (gee, free fall on Earth) 9.806 65 m·s-2 defined
standard atmosphere 101 325 Pa defined

If you could number the above constants it will be 42 constants.

Answer 4

The Universe begin to creat from these constants / formulas:
1) T=0K.
2) R/N=K , E=Mc^2 ,C/D=pi ,i = -1.
3) h
4) h=h/2pi
5).....

Answer 5

There is only one thing that is universally constant, and that is that things constantly change!

Answer 6

I will say about 50 important ones.

Answer 7

no one knows. in real. because the universe is infinite but i know this:

Absolute 0 = -256° C
G force= 10
Pi= 3,414

Answer 8

hey there r many ....like boltzmann constant, gas constant, planck's constant, etc...