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 About RF Cafe Copyright: 1996 - 2024Webmaster:    Kirt Blattenberger,     BSEE - KB3UON RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website: AirplanesAndRockets.com

Physical Constants

The list presented below contains physical constants not specifically related to electricity or magnetism.

* : Reduced Planck constant, = h/2π

Visit NIST for all constants, units, and uncertainties.

This is their Extensive Listing of constants

Here is a table of physical units.

 Name Symbol Value Alpha Particle Mass mα 6.644 656 5 x 10-27  kg Alpha Particle Molar Mass Mα 4.001 506 179 149 x10-3  kg/mol Atomic Mass Unit mu 1.492 417 90 x 10-10  J1.660 538 86 x 10-27  kg7.513 006 608 x 1014  1/m2.252 342 718 x 1023  Hz1.080 952 7 x 1013  K Avogadro N0 6.022 0 x 1023  molecules/mol Bohr Radius a0 0.529 177 2108 x 10-10  m Boltzmann k 1.380 7 x 10-23  J/K Deuteron Mass md 3.343 583 35 x 10-27  kg Deuteron Molar Mass Md 2.013 553 212 70 x 10-3  kg/mol Electron Rest Mass me 9.109 382 6 x 10-31  kg Fine Structure α e2/4·π·ε0··c 7.297 352 568 x 10-3 Gravitational G 6.672 0 x 10-11  N·m2/kg23.449 0 x 10-8  lb·ft2/slug2 Fermi Coupling GF/·c 1.166 39 x 10-5  1/GeV2 Mass-Energy Ratio c2 8.987 6 x 1016  J/kg Muon Magnetic Moment -4.490 447 99 x 10-26  J/T Muon Mass mμ 1.883 531 40 x x10-28  kg Muon Molar Mass Mμ 0.113 428 9264 x 10-3  kg/mol Planck* h 6.626 2 x 10-34  J·s Planck Length lP 1.616 24 x 10-35  m Planck Mass mP 2.176 45x 10-8  kg Planck Temperature TP 1.416 79 x 1032  K Planck Time tP 5.391 21 x 10-44  s Proton Rest Mass mp 1.672 621 71 x 10-27  kg Rydberg R∞ 10 973 731.568 525  1/m3.289 841 960 360 x 1015  Hz2.179 872 09 x 10-15  J 13.605 6923  eV Speed of Light (in vacuum) c 2.997 9 x 108  m/s Stefan Boltzmann s 5.670 3 x 10-8  W/(m2·K4) Tau Mass mτ 3.167 77 x 10-27  kg Tau Molar Mass Mτ 1.907 68 x 10-3  kg/mol Thomson Cross Section σe 0.665 245 873 x 10-28  m2 Unified Atomic Mass 1.660 538 86 x 10-27  kg Universal Gas R 8.314 4  J/(mol·K) Volume of Ideal Gas (@STP) V 2.241 4 x 10-2  m3/mol Weak Mixing Angle θW 0.222 15  rad Wien Displacement Law 2.897 7685 x 10-3  m·K

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