A bat flies toward a wall at a speed of 55 ms as it flies
a) A bat flies toward a wall at a speed of 5.5 m/s. As it flies, the bat emits an ultrasonic sound wave with frequency 29.0 kHz. What frequency does the bat hear in the reflected wave?
b) What is the intensity of sound at 20 dB?
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a a bat flies toward a wall at a speed of 55 ms as it flies the bat emits an ultrasonic sound wave with frequency 290
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