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Colt1911 [192]
3 years ago
8

A bat, flying at 7.00 m/s toward a wall, emits a chirp at 50.0 kHz. If the wall reflects this sound pulse, what is the frequency

of the echo received by the bat? (vsound = 340 m/s)
Physics
1 answer:
777dan777 [17]3 years ago
3 0

Answer:

Explanation:

Given

Velocity of bat v_o=7\ m/s

Frequency of sound f=50\ kHz

velocity of sound v=340\ m/s

using Doppler Effect apparent frequency is given by

f'=f\cdot \frac{v-v_o}{v+v_s}

where  

f'=apparent frequency  

v=velocity of sound in the given media

v_s=velocity of source

v_o=velocity of observer      

here velocity of source is zero

as source is travelling towards source thus

f'=50\cdot (\frac{340+7}{340})

f'=51.029\ Hz                            

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