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Date May 2013 Marks available 1 Reference code 13M.1.HL.TZ2.15
Level Higher level Paper Paper 1 Time zone Time zone 2
Command term Question number 15 Adapted from N/A

Question

A stationary source of sound emits sound of frequency f. A moving observer measures the sound as having the frequency f ′. The observer is moving directly away from the source at a speed that is 30% of the speed of sound in air.

Which of the following gives the correct value for ff?


A. 710


B. 1013


C. 1310


D. 107

Markscheme

A

Examiners report

[N/A]

Syllabus sections

Additional higher level (AHL) » Topic 9: Wave phenomena » 9.5 – Doppler effect
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