In wave tanks, students investigated how water waves are affected by barriers and the depth of the water. They made diagrams of their observations
Which diagram shows reflection of water waves in the wave tank?
Solid Barrier
Barrier with
One Opening
O A
Incoming
Waves
Incoming
Waves
Deep
Water
Shallow
Water
Barrier with
Two Openings
D.
B.
Incoming
Waves
Incoming
Waves

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.