1. The fact that a trumpet and a saxaphone sound different whenplaying the same fundamental frequency is best explained by whichconcept listed below?
a. The Doppler Effect
b. Sound wave reflection
c. Beats
d. Timbre
2. A single-frequency air horn (f = 800 Hz) is sounded by arider in a roller coaster moving toward you at 47 m/s as you standnext to the track. What frequency do you hear? Assume the speed ofsound to be 340 m/s.
a. 928 Hz
b. 1004 Hz
c. 1109 Hz
d. 832 Hz
3. Using the same scenario as question #2, now assume that youare a rider on a second coaster moving toward the sender. You bothhave the same speed relative to the ground. You hear a frequency of1207 Hz. What is the frequency of the sender's air-horn?
a. 752 Hz
b. 834 Hz
c. 888 Hz
d. 914 Hz
