Afigure skater begins spinning counterclock-
wise at an angular speed of 3.6 7 rad/s. dur-
ing a 5.0 s interval, she slowly pulls her arms
inward and finally spins at 8.5 7 rad/s.
what is her average angular acceleration
during this time interval?
answer in units of rad/s.

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