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A sound detector by a road sends out 32.0 kHz. The echo… | StemPy Lab

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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?

PhysicsHardHigh School (11–12)Waves & Sound › Sound Waves and Hearing Waves & Sound › Superposition and Standing Waves Waves & Sound › Doppler Effect NEET

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A sound detector by a road sends out $32.0\ \text{kHz}$ . The echo from an approaching car, mixed with the sent sound, gives $3.20\ \text{kHz}$ beats. Taking sound to travel at $340\ \text{m/s}$ , how fast is the car?

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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?A source moves straight towards a listener who stands still, and the listener hears twice the source's own frequency. The speed of sound is v. How fast is the source? →

More onWaves & Sound › Sound Waves and Hearing Waves & Sound › Superposition and Standing Waves Waves & Sound › Doppler Effect

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