A horse runs around a circular track that is 350.0 m long. He runs clockwise from the start line back to the start line, then turns back and goes counterclockwise back
to the start line again. What is the horses displacement?

A. 0 m
B. 300.0 m counterclockwise
C. 300.0 m counterclockwise
D. 600.0 m

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.