A heavy owl stands on a string of mass 20 g is tied between two trees that are 2 m apart in a mountain top where the atmospheric pressue is 0.900 atm and the temperature is 3.0 degrees C. When the owl flies away, the string starts oscillating up and down. The resulting standing wave produces a fundamental frequency of 220 Hz. The amplitude of the resulting standing wave is 0.2m.

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A heavy owl stands on a string of mass 20 g is tied between two trees that are 2 m apart in a mountain top where the atmospheric pressue is 0.900 atm and the temperature is 3.0 degrees C. When the owl flies away, the string starts oscillating up and down. The resulting standing wave produces a fundamental frequency of 220 Hz. The amplitude of the resulting standing wave is 0.2m. 

(a) What is the speed of the incident traveling wave?

(b) If another owl approaches the string at a speed of 3.5 m/s, what frequency does it hear? Note the speed of sound is 332m/s at this temperature

(c) If the maximum pressure variations are about 3.2 x 10-2 Pa above and below the atmospheric pressure, what is the intensity of the sound wave? Molar mass of air is 28.97 g/mol 

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