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When the speed of sound in air is 323 m/s, a drone is flying and created...

When the speed of sound in air is 323 m/s, a drone is flying and created a 346 Hz sound as it approaches a crossroads in the forest. a) If the drone is traveling at 19 m/s, what observed frequency does the stationary beaver hear at the crossroads as the drone is approaching AND receding? b) What is the observed wavelength of the sound as the drone is approaching?

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Answer #1

use Doppler effect to calculate observed frequency & wavelength.

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