The waves that carry the most energy are the waves that
a) move into a new medium
b) are the closest together
c) move the most slowly
d) have the greatest amplitude
explain your answer

Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.