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Car A, sounding a horn of 410 Hz, chases car B along a… | StemPy Lab
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Car A, sounding a horn of 410 Hz, chases car B along a straight road. A moves at 20 m/s and B at 10 m/s, both in the same direction. What does the driver of B hear?
Physics
Hard
High School (11–12)
Waves & Sound › Sound Waves and Hearing
NEET
Created by
StemPy Lab
Car A, sounding a horn of
410
Hz
410\ \text{Hz}
410
Hz
, chases car B along a straight road. A moves at
20
m/s
20\ \text{m/s}
20
m/s
and B at
10
m/s
10\ \text{m/s}
10
m/s
, both in the same direction. What does the driver of B hear?
398
Hz
398\ \text{Hz}
398
Hz
410
Hz
410\ \text{Hz}
410
Hz
423
Hz
423\ \text{Hz}
423
Hz
448
Hz
448\ \text{Hz}
448
Hz
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← A motorcyclist rides at 17 m/s straight away from a fire station whose siren sounds at 820 Hz. What frequency does the motorcyclist hear?
A sound detector by a road sends out 32.0 kHz. The echo from an approaching car, mixed with the sent sound, gives 3.20 kHz beats. Taking sound to travel at 340 m/s, how fast is the car? →
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