ADVANCED PLACEMENT PHYSICS 1 EQUATIONS, EFFECTIVE 2015 CONSTANTS AND CONVERSION FACTORS Proton mass, 271.67 10 kgpm -= ? Neutron mass, 271.67 10 kgnm -= ? Electron mass, 319.11 10 kgem -= ? Speed of light, 83.00 10 m sc = ? Electron charge magnitude, 191.60 10 Ce -= ? Coulomb?s law constant, 9 201 4 9.0 10 N m Ck pe= = ? i Universal gravitational constant, 11 3 26.67 10 m kg sG -= ? i Acceleration due to gravity at Earth?s surface, 29.8 m sg = UNIT SYMBOLS meter, m kilogram, kg second, s ampere, A kelvin, K hertz, Hz newton, N joule, J watt, W C? coulomb, C volt, V ohm, W 2 degree Celsius, PREFIXES Factor Prefix Symbol 1012 tera T 109 giga G 106 mega M 103 kilo k 10-2 centi c 10-3 milli m