Answer Happy

A student is standing at some point in space and listening to a sound emitted at frequency fo. The graph shows the frequency the student hears during a 4-second interval. Which of the following describes the sound source? f - t (s) 0 1 2 3 4 It moves toward the student but doesn't reach her. It then reverses direction at t = 2 s. It moves away from the student until t = 2 s. It then reverses direction and moves toward the student but doesn't reach her. It moves from right to left passing the student at t = 2 s. It moves from left to right passing the student at t = 2 s. fo