yashiyahgaston
contestada


A police car is parked by the side of a highway and its siren emits a sound measuring 750 Hz. As you approach the police car from a distance, you hear a change in the sound. The change is in the sound's

A) frequency only.
B) pitch only.
C) frequency and wavelength.
D) pitch and frequency

Respuesta :

hssbssssbiss

Answer: It’s D) Pitch and frequency

Explanation: As you approach the police car with blaring siren, you hear a change in pitch and frequency. The apparent pitch changes as a result of the Doppler effect. Frequency determines pitch; frequency and wavelength are inversely proportional. You wouldn’t “hear“ either one. The result is pitch.

Otras preguntas