Why is the value of constant

sizevalueGravitational constantG = 6,673 84·10-11 m3· Kg-1· S-2Standard accelerationGn= 9.806 65 m s-2Vacuum speed of lightc = cO = 299 792 458 m s-1Electric field constantεO = 8,854 187 817...·10-12 F · m-1Magnetic field constantμO = 4π · 10-7 N / A-2Faraday constantF. = 96 485.3365 C · mol-1Universal (molar) gas constantR. = 8.314 4621 J · mol-1· K-1Avogadro's constantNA. = 6,022 141 29·1023 mol-1Loschmidt constant (at 0 ° C, pn)NL.= 2,686 7805·1025 m-3Standard pressurepn = 101 325 Pa = 1013.25 mbarAbsolute zeroT = 0 K, t = -273.15 ° CTriple point of waterT = 273.16 K, t = 0.01 ° CMolar volume of ideal gases (at 0 ° C, pn)V.m = 22,413 968·10-3 m3· Mol-1Boltzmann constantk = 1,380 6488·10-23 J · K-1
   = 8,617 3324·10-5 eV · K-1Atomic mass unitu = 1.660 538 921 x 10-27 kgResting energy of the atom. Mass unit 1 uc2 = 1,492 417 954·10-10 J
= 931.494 061 MeVElemental chargee = 1,602 176 565·10-19 C.Planck's constantH = 6,626 069 57·10-34 J · s
   = 4,135 667 516·10-15 eV · sPlanck's constant / 2pi
ћ = H/ 2π = 1.054 571 726 x 10-34 J · s
            = 6,582 119 28·10-16 eV · sDrilling radiusa0 = 0,529 177 210 92·10-10 mRydberg constantR.y = R. = 1,097 373 156 8539·107 m-1Rydberg frequencyfRy = R.y·c= 3,289 841 960 364·1015 HzVienna constantb = 2,897 7721·10-3 m · KStefan-Boltzmann constantσ = 5,670 373·10-8 W m-2· K-4electron
Rest massme = 9,109 382 91·10-31 kg
     = 5,485 799 0946·10-4 u Resting energyme·c2 = 8,187 105 06·10-14 J
= 0.510 998 928 MeV charge-e = -1,602 176 565·10-19 C. Specific charge-e/me = -1,758 820 088·1011 C kg-1 Compton wavelength of the electronλC. = 2,426 310 2389·10-12 mproton
Rest massmp = 1,672 621 777·10-27 kg
= 1.007 276 466 812 u Resting energymp·c2 = 1,503 277 484·10-10 J
= 938.272 046 MeV chargee = 1,602 176 565·10-19 C. Specific chargee/mp = 9,578 833 58·107 C kg-1 Proton mass / electron massmp/me = 1836,152 672 45 Compton wavelength of the protonλC, p = 1,321 409 856 23·10-15 mneutron
Rest massmn = 1,674 927 351·10-27 kg
= 1.008 664 916 00 u Resting energymn·c2 = 1,505 349 631·10-10 J
= 939.565 379 MeV Neutron mass / electron massmn/me = 1838,683 6605 Compton wavelength of the neutronλC, n = 1,319 590 9068·10-15 mDeuteron Rest massmd= 3,343 583 48·10-27 kg
= 2.013 553 212 712 uResting energymd·c2 = 3,005 062 97·10-10 J
= 1,875,612,859 MeVMass ratio to the electronmd/me = 3 670,482 9652Mass ratio to the protonmd/mp = 1,999 007 500 97Alpha particles Rest massmα = 6,644 656 75·10-27 kg
= 4.001 506 179 125 uResting energymα·c2 = 5,971 919 67·10-10 J
= 3,727,379,240 MeVMass ratio to the electronmα/me = 7 294,299 5361Mass ratio to the protonmα/mp = 3,972 599 689 33