A ball is thrown vertically upward from the ground with velocity of 30m/s¹. Exactly 0.5s later another ball Is dropped from rest from a cliff 40m above the point from which the first stone was projected. find : a) The time after the first stone was thrown when the two stones meet
b) How far above the ground they are at the same time?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line