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A railroad train is travelling at 30 m/s in still air. The frequency of the note emitted by the locomotive whistle is 500 Hz. What is the frequency of the sound waves : behind the locomotive? Speed of sound in air is 344 m/s.

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460 Hz
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AAKASH SERIES-WAVE MOTION AND SOUND-PROBLEMS (LEVEL - II)
  1. A railroad train is travelling at 30 m/s in still air. The frequency o...

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  2. A railroad train is travelling at 30 m/s in still air. The frequency o...

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  3. A railroad train is travelling at 30 m/s in still air. The frequency o...

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  4. A 300 Hz source, an observer and wind are moving as shown in the figur...

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  5. A person standing on a road sends a sound signal to the driver of a ca...

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  6. A stationary sound sources of frequency 334 Hz and a stationary obser...

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  7. Spherical waves are emitted from a 1.0 watt source in an isotropic non...

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  8. The intensity of sound from a point source is 1.0 xx 10^(-8) W//m^2 at...

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  9. Most people interpret a 9.0 dB increase in sound intensity level as a ...

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  10. About how many times more intense will the normal ear perceive a sound...

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  11. The explosion of a fire cracker in the air at a height of 40 m produce...

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  12. The sound level at a point 5.0 m away from a point source is 40 dB. Wh...

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  13. If the intensity of sound is doubled, by how many decibels does the so...

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  14. Sound with intensity larger than 120 dB. appears painful to a person. ...

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  15. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

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  16. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

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  17. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

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  18. Three component sinusoidal waves progressing in the same direction alo...

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  19. A soldier walks towards a high wall taking 120 steps per minute. When ...

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  20. A man stands before a large wall at a distance of 50.0m and claps his ...

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