an 85-kilogram skydiver performs a free fall from a stationary helicopter at a height of one mile. what is the estimated resulting velocity of the free fall considering the man fell for a half a mile before pulling his parachute

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