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Two cars are approaching each other on a...

Two cars are approaching each other on a straight road and moving with a velocity of` 30 kmh-1`. If the sound produced in a car is of frequency 500 Hz, what will be the frequency of sound as heard by the person sitting in the other car ? When the two cars have crossed each other and are moving away from each other, what will be the frequency of sound as heard by the same person ? Speed of sound= `330 ms^-1`.

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SL ARORA-Waves-EXERCISE
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  2. A motor car is approaching towards a crossing with a velocity of 75 km...

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  3. Two cars are approaching each other on a straight road and moving with...

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  4. A source emitting sound of frequency 1000 Hz is moving towards an obse...

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  5. A policeman on duty detects a drop detects a drop of 15% in the pitch...

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  6. The whistle of an engine moving at 30km//h is heard by a motorist driv...

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  7. A car passing a check post gives sound of frequency 1000 c.p.s. If the...

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  8. Light can travel in vacuum but sound cannot travel. Explain.

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  9. The disc of a siren containing 60 holes rotates at a constant speed of...

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  10. The speed of a wave in a medium is 760 m/s. If 3600 waves are passing ...

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  11. A tuning fork makes 256 vibrations per second in air. When the speed o...

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  12. A tuning fork of frequency 250 Hz is vibrating at one end of a tube as...

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  13. The wavelength difference of light waves of the wave numbers ...

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  14. The disc of siren has n holes and the frequency of its rotation is 300...

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  15. The frequency of tuning fork is 256 Hz. It will not resonate with a fo...

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  16. The velocity of transverse wave in a stretched string is proportional ...

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  17. The speed of a transverse wave going on a wire having a length 50 cm ...

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  18. The speed (v) of ripples on the surface of waterdepends on surface ten...

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  19. Velocity of sound in air is

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  20. If at same temperature and pressure, the densities for two diatomic ga...

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