anonymous
  • anonymous
Sam is walking through the park. He hears a police car coming down the street toward him. What happens to the sound of the siren as the police car approaches and then passes Sam?
Physics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
(A) Sound waves from the siren remain constant. As the police car drives past Sam, the sound waves decrease in frequency. (B) The frequency of sound waves from the siren increase. As the police car continues past Sam, the sound waves decrease in frequency. (C) The frequency of sound waves from the siren decrease. As the police car drives past Sam, the sound waves increase in frequency. (D) The frequency of the sounds waves from the siren increase and continues to increase as the police car passes and drives away from Sam.
anonymous
  • anonymous
@Greg_D I think this one is B. Am I correct?
anonymous
  • anonymous
i would say b also... this is the doppler effect

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anonymous
  • anonymous
i think that is the best option, but.... looking at the possible answer i don't think they are well expressed, since the freq of the siren is always the same!!! the person that hears the sound perceives a modified frequency due to the movement of the source. but again if i had to pick one of those i would go with B
anonymous
  • anonymous
Okay then thank you for your help!
anonymous
  • anonymous
yw!

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