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7 September, 16:03

As you drive down the road, you see and hear an ambulance go by you in the

opposite direction. After it passes, how is the frequency you hear different

from that being produced by the ambulance?

O

A. It is higher due to the Doppler effect.

B. It is lower due to the Doppler effect.

O

C. It has not changed, as the two vehicles cancel each othe_out.

O

D. It depends on which vehicle is moving the fastest.

+1
Answers (2)
  1. 7 September, 16:23
    0
    B. It is lower due to the Doppler effect.

    Explanation:

    According to the Doppler effect, observed frequencies are higher than the source frequency if the source is moving towards the observer, and lower if the source is moving away from the observer.

    After the ambulance passes, it is moving away from you, so the frequency you hear is lower than the frequency at the ambulance.
  2. 7 September, 19:13
    0
    B. It is lower due to the Doppler effect.
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