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How is ultrasound used for cleaning ?...

How is ultrasound used for cleaning ?

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Ultrasound is used to clean parts located in hard to reach places i.e., spiral tube, odd shaped parts, electronic components etc. Objects to be cleaned are placed in a cleaning solution and ultrasonic waves are sent into the solution. Due to high frequency stir up or vibration, the particles of dust grease and dirt get detached and drop out. The objects get thoroughly cleaned.
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NAND LAL PUBLICATION-SOUND-Exercises
  1. Why is sound wave called longitudinal wave?

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  2. Which characteristic of the sound help you to identify your friend by ...

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  3. Flash and thunder are produced simultaneously. But thunder is heard a...

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  4. A person has a hearing range from 20 Hz to 20 KHz. What is the typical...

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  5. Two children are at opposite ends of an aluminium rod. One strikes the...

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  6. The frequency of source of sound is 100 Hz. How many times does it vib...

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  7. Does sound follow the same laws of reflection as light does ? Explain.

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  8. When a sound is reflected from a distant object, an echo is produced. ...

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  9. Give two practical applications of reflection of sound waves.

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  10. A stone is dropped from the top of a tower 500 m high into a pond of w...

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  11. A sound wave travels at a speed of 339 ms^-1. If its wavelength is 1.5...

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  12. What is reverberation ? How can it be reduced ?

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  13. What is loudness of sound ? What factors does it depend on ?

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  14. What is loudness of sound ? What factors does it depend on ?

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  15. Explain how bats use ultrasounds to catch a prey ?

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  16. How is ultrasound used for cleaning ?

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  17. Explain the working and applications of SONAR.

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

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  19. Explain how defects in a metal block can be detected using ultrasound ...

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  20. Explain how the human ear works.

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