A car with its horn sounding approaches a group of students. Assume the car’s horn produces sound waves with a constant frequency.Which of the following statements bestexplains why the students hear a higher pitch as the car approaches than when it is stopped?

Question

Answer: D - The sound waves are heard at a higher frequency as the car approaches the students.

Ted Chan · Accepted Answer

The sound waves are heard at a higher frequency as the car approaches the students.

AP Physics B Practice Exam