ADVANCED PLACEMENT PHYSICS C TABLE OF INFORMATION CONSTANTS AND CONVERSION FACTORS 164 | Appendix V.1 AP Pi C MniCours x cription 00762-139-CED-Physics C-Mechanics_Appendixes.indd 164 3/13/19 12:15 PM Proton mass, m. p =1.67 ´10 27. kg. Neutron mass, 1.67 10 kg. 27. m. n = ´ Electron mass, 9.11 10 kg. 31. m. e = ´ Avogadro's number, 23 1. N ...