CBSE Class 9 Science Question 16 of 33

Sound — Question 16

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Question 16

How is ultrasound used for cleaning?

Answer

Ultrasound is used to clean parts located in hard-to-reach places, for example, 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 the high frequency, the particles of dust, grease and dirt get detached and drop out. Thus, the object is thoroughly cleaned.