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Subjects
Science CBSE
Class 9
Sound
Textbook questions
16.
Exercises XVI
Exercise condition:
2
m.
How is ultrasound used for cleaning?
Objects to be cleaned are placed in a cleaning solution and ultrasonic waves are passing through the solution.
Due to the
low frequency
high frequency
, the dust particles, grease
get detached and drop out
get attached and drop out
. The objects thus get thoroughly cleaned.
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