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Waves of higher frequencies are used for...

Waves of higher frequencies are used for cleaning hard-to-reach places. These are also used to detect and find the distance of object under water.
What is the frequency of these waves?

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Greater than 20,000 Hz
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MTG IIT JEE FOUNDATION-SOUND-Exercise (Subjective Problems) Short Answer Type
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  2. The sound of an explosion on the surface of a lake is heard by a boat...

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  3. A large auditorium has a curved back. Explain.

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  4. Two waves are shown below. Which of the two corresponds to lower decib...

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  5. What is the difference between an echo and a reverberation ?

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  6. (a) A sound wave travelling in a medium is represented . (i) Which l...

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  7. A sound wave travelling in a medium is represented as shown in the fig...

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  8. (a) A sound wave travelling in a medium is represented . (i) Which l...

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  9. A big explosion on the moon cannot be heard on the earth because

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  10. Where is reverberation desirable and where is this to be avoided ?

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  11. A narrow sound pulse (for example, a short pip by a whistle) is sent a...

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  12. A narrow pulse (for example, a short pip by a whistle) is sent across ...

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  13. A snapshot is taken of a periodic wave travelling on a string as shown...

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  14. The frequency of a source of sound is 100 Hz. How many times does it v...

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  15. When we nibble at a rusk, we hear a noise that is simply deafening. Bu...

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  16. A sonar device on a submarine sends out a signal and receives an echo ...

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  17. Waves of higher frequencies are used for cleaning hard-to-reach places...

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  18. Waves of higher frequencies are used for cleaning hard-to-reach places...

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  19. Waves of higher frequencies are used for cleaning hard-to-reach places...

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  20. An observer notes that there is a 6 second interval between seeing a f...

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