How is ultrasound used to clean hard-to-reach places?

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We can see dirt/dust particles by using ultrasound.

Ultrasonic waves stir up the dust/dirt particles.

Ultrasonic waves absorb all the dust/dirt particles.

All of these

answer is B.

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Detailed Solution

Ultrasound is used to clean hard-to-reach places by ultrasonic waves that stir up the dust/dirt particles.
Ultrasonic waves are used to clean difficult-to-reach areas such as spiral tubes and odd-shaped machine parts. The object to be cleaned is immersed in the cleaning solution, which is then subjected to ultrasonic waves. The ultrasonic waves move the dust/dirt particles around. These particles are separated, and the object is thoroughly cleaned as a result.

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