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anonymous

  • one year ago

A fire truck with its siren blowing passes you. What happens to the sound of its siren as the truck moves away from you? A. the pitch gets higher B. the pitch gets lower C. the amplitude gets higher D. the amplitude gets lower

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  1. Michele_Laino
    • one year ago
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    here the Doppler effect is involved

  2. anonymous
    • one year ago
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    ok! what does that mean? :/ pitch gets lower?

  3. Michele_Laino
    • one year ago
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    since the source of the sound is going away from me, then the received frequency from me, is less than the emitted frequency by the truck

  4. anonymous
    • one year ago
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    ohh so the solution should be amplitude is lower? choice D?

  5. Michele_Laino
    • one year ago
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    I think that the answer is the pitch gets higher, since we have the subsequent relationship between wave length and frequency: \[\Large \lambda = \frac{v}{\nu }\] where v is the speed of sound

  6. anonymous
    • one year ago
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    ohhh okay! makes sense :) thank you!!!

  7. Michele_Laino
    • one year ago
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    :)

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