Asound wave moves from a medium where particles of matter are closely packed to a medium where particles are farther apart. how do you expect the sound to travel differently?

the wave will move faster, increasing its amplitude.

there will be not change in the wave's travel.

the sound will slow down, changing its speed.

the wavelength will change along with frequency.

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.