A billiard ball collides with another ball with a force of 30 N after rolling for 3 seconds. What is the impulse during the collision?

The impulse is 90Ns.

Explanation:

Given that the formula for impulse is F×t, where F represents force and t is time (in seconds) :

Impulse = F × t

Impulse = 30 × 3 = 90Ns

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

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