Answer to Question #73346 in General Chemistry for yousif

Question

To dramaticaly improve accuracy, a rifle barrel has curved internal groovesrunning its length to induce the bullet to spin as it travels down the barrel. Bulets commonly make complete rotation within 11 inches of travel. If the muzzle velocity of a bullet is 2750 feet per second, calculate the rotation rate of the bullet.

Answer 1

This problem can be solved by setting up a simple one-line conversion, the only extra information used is that 1 foot equals to 12 inches:
(1 rotation/11 in)(12 in/1 ft)(2750 ft/1 second) = 3000 rotations/second.
Answer: 3000 rotations/second.