Question

A student hears a police siren. What would change the frequency that the student hears? Check all that apply. if the student walked toward the police car if the student walked away from the police car if the police car moved toward the student if the police car moved away from the student if the intensity of the siren increased if the intensity of the siren decreased

Answer 1

Answer:

if police car move toward student then frequency increase.

if boy walk toward it frequency increase.

if student move away frequency decrease.

if car move away frm student frequency decrease.

this is Doppler effect