- #1
dmolson
- 19
- 0
The pitch of the sound from a racecar engine drops the musical interval of a fourth when it passes the spectators. This means the frequency of the sound after passing is 0.75 times what it was before. How fast is the racecar moving?
a. 68 m/s
b. 49 m/s
c. 61 m/s
d. 72 m/s
a. 68 m/s
b. 49 m/s
c. 61 m/s
d. 72 m/s