PLEASE HELP
Puck 1 is moving 10 m/s to the left and puck 2 is moving 8 m/s to the right. They have the same mass, m.

A. What is the total momentum of the system before the collision? (Write your answer in terms of the mass, m.) (0.5 points)
B. What is the total momentum of the system after the collision? (Write your answer in terms of the mass, m.) (0.5 points)
C. Write puck 1's velocity after the collision in component form. (1 point)
D. What is the y-component of puck 2's velocity after the collision? (1 point)
E. What is the x-component of puck 2's velocity after the collision? (1 point)
F. At what angle does puck 2 move after the collision? Determine the angle and draw it on the diagram. (1 point)
G. What is the magnitude of puck 2's velocity after the collision? (1 point)

volts times amps 6 x 0.5 3w

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

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