Cosmology (Edexcel A Level Physics)

Exam Questions

11 mins2 questions
1
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The diagram shows a source of sound waves and an observer.

q6-nov-2021-9ph0-02-edexcel-as-a-level-phy

Which row of the table shows a situation which would result in a decrease in the frequency of sound observed?

  Source Observer
A moves to the right at 20 ms−1 moves to the left at 20 ms−1
B moves to the right at 20 ms−1 moves to the right at 20 ms−1
C moves to the right at 20 ms−1 stationary
D stationary moves to the right at 20 ms−1

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