Object A has mass mA = 8 kg and initial momentum vector pA, i = ( 22, -8, 0 ) kg · m/s, just before it strikes object B, which has mass mB = 12 kg. Just before the collision object B has initial momentum vector pB, i = (3, 5, 0) kg · m/s. The forces that A and B exert on each other are very large but last for a very short time. If we choose a time interval from just before to just after the collision, what is the approximate value of the impulse applied to the two-object system due to forces exerted on the system by objects outside the system?

so easy. just google the electromagnetic waves and it’ll pop up.

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

where is the

answeralert drivers who drift off the road;