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Physics: Back Of The Envelope - Statistics

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General Stats
  • This quiz has been taken 21 times
  • The average score is 4 of 13
Answer Stats
Constant Expression Value Notes Percent Error % Correct
speed of light c 3p8 +0
90%
Avogadro NA 6p23 conversion from protons to grams -0
90%
gravitational G 7n11 the coefficient is closer to a simple fraction +5
60%
Joules per (small-c) calorie 4 -4
50%
Coulomb 1/4πε0 9p9 +0
30%
reciprocal of fine structure 1/α 137 -0
20%
Boltzmann k 1.4n23 just one digit is too sloppy +1
20%
reduced Planck ℏ 1n34 -5
20%
Biot-Savart μ0/4π 1n7 1/ε0μ0 = c2 +0
20%
electron masses per nucleon 2p3 +9
10%
reduced Compton wavelength ƛ = ℏ/mec 4n13 the Bohr radius is ƛ/α and the classical electron radius is ƛα +4
10%
eV per Joule or electrons per Coulomb 6p18 convenient conversion from atomic to macroscopic scale -4
10%
Bohr magneton eℏ/2me 9n24 -3
10%
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