in a billiards game, the white cue ball hits the black ball, moving the black ball to the right while the cue ball moves to the left. if the action force is applied by the cue ball to the black ball, which force is the reaction force?

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

explanation:

wheres the pic