Two mechanical waves intersect and produce the straight line seen here. what must be true about the amplitude of both waves?

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

What will a positive and a negative charge do if they are separated from each other?

Positrons are spontaneously emitted from the nuclei of