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Physics

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Two eagles fly directly toward one another, the first at 13 m/s and the second at 21 m/s. Both screech, the first emitting a frequency of 3200 Hz and the second, a frequency of 3800 Hz. What frequencies do they hear if the speed of sound is 345 m/s? (Tip: keep 4 significant figures on this one.)
a) Frequency heard by the first eagle = Hz

HELP: This is a Doppler effect problem.

HELP: Each eagle is the source of the sound heard by the other eagle. Each eagle is also the observer of the sound made by other eagle.

HELP: What is the source velocity in this case? What is the observer velocity in this case?

b) Frequency heard by the second eagle = Hz

HELP: What is the source velocity in this case? What is the observer velocity in this case?

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