Map Sapling Learning In each of the four scenarios to the right, a large bat let

Question

Map Sapling Learning In each of the four scenarios to the right, a large bat lets out a short burst of ultrasonic sound, which the smaller bat hears a moment later. If the large bat flies at 2.650 m/s and the small bat flies at 12.60 m/s, rank the frequency that the smaller bat detects in the four scenarios, from highest to lowest. Assume that the speed of sound is 343.0 m/s highest frequency lowest frequency In scenario C, some of the large bat's signal reflects off of the small bat and returns to the large bat, warning it of the smaller bat's presence. If the initial signal has a frequency of 72.00 kHz, what return frequency will the large bat detect? Calculate the final frequency c to four significant figures. Number kHz Previous Give Up & View Solution Check Answer Next Exit y Hint

Explanation / Answer

highest frequency
B
D
A
C
Lowest frequency

Return frequency heard by the large bat,
f' = f*(vo - v_bat)/(v + v_bat)

= 72.00*(343 - 2.65)/(343 + 2.65)

= 70.90 Hz

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