On earth, a bowling ball is dropped, and it falls 19.6 meters just before it hits the ground. how much time did it take the bowling ball to fall this distance?

Idon’t quite understand this problem

Which type of basaltic lava flow has a fairly smooth

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