Observe a bouncy collision (also known as an elastic collision) and discuss whether or not the outcome was what you predicted it to be. Use carts with spring plungers or magnets. If not, draw a new sketch in the space that follows with arrows indicating the magnitudes and directions of the velocities. What is the apparent relationship between the final velocities and

he . if i may ask what i your question exactly?

explanation:

i guess it’s a and b

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