A Woman Drives Toward the Face of a Cliff at 26.8

Multiple Choice

A woman drives toward the face of a cliff at 26.8 m/s.She sounds a burst on her 500-Hz car horn and then listens for the echo.Assuming 313 m/s to be the speed of sound,the woman hears an echo frequency of

A) about 595 Hz
B) about 545 Hz
C) exactly 500 Hz
D) about 460 Hz
E) exactly 1000 Hz