The recieved sound frequency is 42.5 kHz.
The way sound waves oscillate as they pass past our ears—alternating between compressing and expanding the medium, which is usually air—determines the sound frequency. All sound waves go through the same medium at the same pace. The Doppler Effect states that while a source or an observer is moving, the frequency of the sound wave varies. Echo is the term for a sound wave's reflection. It varies depending on the media.
Frequency of the sound due to reflection of an object moving away from the bat is given as
f = f' (v - v'/v + v')
v' = 27.5m/s
v = 340m/s
f' = 50KHz
Thus f = 50 (340- 27.5/340 + 27.5) = 42.5KHz
Hence the sound frequency received from the object is 42.5 kHz.
To know more about sound frequecny refer:
https://brainly.com/question/29707602
#SPJ4
Complete question is:
A bat at rest sends out ultrasonic sound waves at 50.0 kHz and receives them returned from an object moving directly away from it at 27.5 m/s. What is the received sound frequency?