Constants

Speed of light in vacuum Permittivity of vacuum Permeability of vacuum Planck’s constant Elementary charge Avogadro’s number Boltzmann’s constant Electron mass Proton mass Wavelength of light Linear dimension of atoms Typical chemical energy Atoms/cm3 in solids Molecules/cm3 in gas Linear dimension of nuclei Nuclear binding energy

c = 3.0 × 108 m/s 0 = 8.85 × 10−12 C2 · N−1 · m−2 µ0 = 4π × 10−7 T · m · A−1 h ¯ = 1.05 × 10−34 J · s = 6.58 × 10−16 eV · s e = 1.602 × 10−19 C NA = 6.02 × 1023 mol−1 kB = 1.38 × 10−23 J · K−1 me = 9.109 × 10−31 kg = 510 keV/c2 mp = 1.67 × 10−27 kg = 938 MeV/c2 6 × 10−7 m (approx.) several×10−10 m (approx.)

Gravitational constant Gravitational acceleration Earth’s mass Earth’s radius Sun’s mass Sun’s radius Moon’s mass Moon’s radius Mean distance earth-sun Mean distance earth-moon Speed of sound at STP Kinematic viscosity of air Density of air (sea level) Kinematic viscosity of H2 O Density of H2 O Atmospheric pressure

G = 6.67 × 10−11 N · m2 · kg−2 g = 9.8 m/s2 Me = 5.975 × 1024 kg Re = 6.38 × 106 m Ms = 1.987 × 1030 kg Rs = 6.96 × 108 m Mm = 7.35 × 1022 kg Rm = 1.7 × 106 m 1.50 × 1011 m 3.85 × 108 m 335 m/s = 749 mi/hr ν = 0.150 cm2 · s−1 at 20◦ C ρ = 1.29 × 10−3 gm · cm−3 ν = 1.007 × 10−2 cm2 · s−1 at 20◦ C ρ = 1.0 gm · cm−3 1 atm = 760 mm Hg = 1 × 105 N · m−2

Length Speed Mass Force Pressure Energy Power Thickness of paper Mass of paperclip Length of day Length of year Finger at arm’s length Mountains, oceans Incident solar power U.S. population World population

1 m = 39.37 in.; 1 km = 103 m=0.6214 mile 1 m/s = 3.281 ft/s=3.6 km/hr=2.237 mi/hr 1 kg = 103 gm = 2.205 lb mass=0.0685 slug 1 N = 1 kg m/s2 = 0.2248 lb 1 atm = 760 mm Hg = 14.6 lb/in2 1 J = 1 N·m = 0.24 cal = 6.24×1018 eV 1 W = 1 J/s; 745.7 W = 1 hp 0.1 mm (approx.) 0.5 gm (approx.) 86,164 s (approx. 105 s) 3.156 × 107 s (approx. π × 107 s) subtends an angle of 1◦ (approx.) 10 km (approx.) for highest, deepest 1.4 × 103 W/m2 at earth’s surface 270 × 106 (approx.) 6 × 109 (approx.)

several eV per atom (approx.) 1023 (approx.) 2.7 × 1019 at STP several×10−15 m (approx.) Typically 8 MeV per nucleon (approx)

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