Snap, Crackle and Pop The first derivative of position with respect to time is velocity, the second is acceleration, and the third is jerk. The fourth is snap, or jounce, while the fifth and sixth are sometimes called crackle and pop. Snap, Crackle and Pop Snap, Crackle and Pop are the cartoon mascots of Kellogg's crisped-rice breakfast cereal Rice Krispies. The gnomic elves characters were originally designed by illustrator Vernon Grant in the early 1930s. The names are an onomatopoeia and were derived from a Rice Krispies radio ad: The first character appeared on the product's packaging in 1933, Grant added two more and
Winchester Model 1903 balances the recoil forces so that the breech bolt does not move rearward until the bullet has left the muzzle of the barrel, and therefore allows the bullet to be fired with no loss of energy. The original design of this self-loading mechanism required Winchester to design a custom cartridge (the .22 Winchester Automatic) to go along with it. This mechanism was redesigned for the Model 63 to allow it to fire the .22 Long Rifle cartridge, which by then had become much more popular. The Model 1903 was advertised as an "automatic rifle". In modern times, it is more