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A police car passes a pedestrian with its siren on. A change in the siren's pitch is
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A police car passes a pedestrian with its siren on. A change in the siren's pitch is

User Lmnbeyond
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2 Answers

4 votes

Answer:

By the pedestrian.

Step-by-step explanation:

User Gordian Yuan
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7 votes
The Doppler effect. The farther away the siren gets, the lower the pitch will get.
User Daniel Mendel
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