5.

Question

The pitch of the siren of a moving fire truck changes from high to low as the fire truck passes by. What property of a sound wave changes as the fire truck goes by? (1 point)

A.amplitude
B.density
C.temperature
D. frequency***

Answer 1

I think your answer is right; the frequency changes as the fire truck goes by. However, I have a problem with the statement that the pitch changes from high to low as the fire truck passes by. As the fire truck comes toward you the frequency increases; after the fire truck passes the frequency decreases. So I would state that the pitch increases as the fire truck is coming and the pitch decreases after the fire truch passes.

Answer 2

It is a homework question so i can not change it! Thanks!!

Answer 3

I understand that but I wanted to clear the air.

Answer 4

so the answer is?? im so lost, i have connexus and im doing 7th grade "Lesson 9: Waves and Electromagnetic Radiation Unit Test" and rlly need help, so if anyone can yk slide the answers or help i'd love that. anyways bye