CHAPTERS BY WACEK KIJEWSKI

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# Chapter 14 Physical Constants

π = 3.14159

e = 2.71828

1 radian = =57.2958 degrees

 acceleration due to gravity in Cape Town = 9.7966 m/s² acceleration due to gravity in Gaborone = 9.7860 m/s² acceleration due to gravity on Equator = 9.7803 m/s² acceleration due to gravity in Budapest = 9.8085 m/s² acceleration due to gravity in London = 9.8118 m/s² acceleration due to gravity in North Pole = 9.8322 m/s² acceleration due to gravity on the Moon = 1.66 m/s² gravitational constant (G) = 6.672 × 10-11 N m2 kg-2 speed of sound in air = 330 – 333 m/s speed of sound in water = 1500 m/s speed of sound in steel = 5000 m/s speed of light in a vacuum (c) = 2.99793 × 108 m/s standard volume of an ideal gas = 22.41 dm3 Avogadro's constant = 6.022 × 1023 mol-1 proton rest mass = 1.673 × 10-27 kg electron rest mass = 9.110 × 10-31 kg charge on a proton or electron (±e) = ± 1.602 × 10-19 C charge of 1C = 6.241 × 1018 electrons charge/mass ratio for an electron (-e/m) = -1.759 × 1011 C kg-1 Planck's constant (h) = 6.626 × 10-34 J s radius of electron = 2.818 × 10-15 m α particle, mass = 6.645 × 10-27 kg radius of hydrogen atom = 5.292 × 10-11 m temperature of absolute zero = -273.16 °C

Do you like anecdotes, interesting and challenging problems, fun facts, puzzles, jokes related to metric system and measurement? Read them in the 2006 on-line edition of "SI Units, Conversion and Measurement Skills",186 pp.