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A airplane flies directly away from you if you perceive its

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Reference no: EM13594750

A airplane flies directly away from you. If you perceive its engine sound at 82 % of the emitted frequency, the plane's speed is:

A. 75 m/s.

B. 55 m/s.

C. 67 m/s.

D. 61 m/s.

Reference no: EM13594750

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