Reflection occurs when a wave

a. travels along a surface separating two media

b. passes through a surface of a different density

c. bounces off a surface it cannot pass through

the correct answer is A it travels along the surface separating two media . hope this helps :)

b

step-by-step explanation: a third of 24 is 8, 8 times 3 is 24 so 8 - 2 would be 6

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.