Acceleration of gravity = 980.616 cm/sec/sec . . . = 32.17 ft/sec/sec

Avogadro's Number = 6.023 x 10^23 (molecules per mole)

Density of water @ 4 degrees C. = 1 gram/cc . . . = 62.4 lb/cubic foot

Pi = 3.14159265

Speed of light = 300,000 km/sec . . . = 186,281 miles/sec

Speed of sound = about 1100 ft/sec (medium dictates)