We think you are located in South Africa. Is this correct?

# Physical Constants

 Acceleration due to gravity g = 9,8 m·s−2 Gravitational constant G = 6,67 × 10-11 N·m2·kg−2 Speed of light in a vacuum c = 3,0 × 108 m·s−1 Planck's constant h = 6,63 × 10-34 J·s Coulomb's constant k = 9,0 × 109 N·m2·C−2 Charge of an electron e = −1,6 × 10−19 C Electron mass me = 9,11 × 10−31 kg Standard pressure pθ = 1 atm = 1,013 × 105 Pa Standard temperature Tθ = 0 °C = 273 K Molar gas volume at STP Vm = 22,4 dm3·mol-1 Universal gas constant R = 8,31 J·K−1·mol−1 Avogadro's number NA = 6,022 × 1023 mol-1