CONSTANTS, DATA, AND CONVERSIONS FOR PHYSICS EXAM
Acceleration due to gravity near Earth's surface (g ) = 9.80 m/s2 = 9.80 N/kg
Atomic mass unit (amu) = 1.66 × 10 –27 kg = 931.5 MeV/c 2
Avogadro's constant (N A ) = 6.02 × 1023 /mol
Boltzmann constant (kB ) = 1.38 × 10 –23 J/K
calorie = 4.18 J
Coulomb constant (k ) = 1/(4πε 0 ) = 8.99 × 109 Nm2 /C2
Density of air at STP = 1.29 kg/m3
Density of water at 20°C and 1 atm = 1.00 × 103 kg/m3
Electron charge (e−) = 1.60 × 10 –19 C
Electron mass (me ) = 9.11 × 10 –31 kg = 5.49 × 10 –4 amu = 0.511 MeV/c 2
Electron volt (eV) = 1.60 × 10 –19 J
Gas constant (R) = 8.31 J/molK = 0.0821 atm  L/mol  K
Gravitational constant (G) = 6.67 × 10 –11 N  m2 /kg2
Heat of fusion of ice at STP = 80.0 cal/g = 3.33 × 105 J/kg
Heat of vaporization of water at 100°C and 1 atm = 540 cal/g = 2.26 × 106 J/kg
Moment of inertia of solid object about axis through the center of mass:
Solid sphere,
2
MR 2
5
Solid cylinder,
1
MR 2 (axis of rotation along the axis of cylinder)
2
Long thin rod,
1
ML2 (axis perpendicular to rod through the center)
12
Ring, MR 2
Permeability of free space ( µ0 ) = 4π × 10 –7 H/m or N/A 2
Physics 6–12
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Permittivity of free space = (ε 0 ) = 1/(4π k ) = 8.85 × 10 –12 C2 /N  m2
Planck's constant (h) = 6.626 × 10 –34 J s = 4.136 × 10 –15 eV  s
Specific heat of water = 1.00 cal/g °C = 4186 J/kg  °C
Speed of light (c) = 3.00 × 108 m/s
Speed of sound in air at 20°C and 1 atm = 343 m/s
Standard atmosphere pressure = 1 atm = 1.01 bar = 1.01 × 105 Pa
= 1.01 × 105 N/m2 = 760 mm Hg
Stefan-Boltzmann constant = 5.67 × 10 –8 W/m2  K 4
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Physics 6–12