ocr: Gravitational acceleration on Earth (g) 9.8m/s2 32ft/s2 Speed of: sound in air 343m/s 1130ft/s Speed of sound in water 1460m/s 4790ft/s Density of air 1.29kg/m3 Density of water 1.00*10°kg/m3 Rest mass ofneutron mn 1.675: X 10-27 kg Rest mass of proton mp 1.672x10-271 kg Rest mass of electron me 9.109 X 10-31kg
