Which range of sound waves can be reflected and used for finding distances, scanning documents, and cleaning engine parts PLZ Help!!!!!‍♂️‍♂️‍♂️‍♂️

Which range of sound waves can be reflected and used for finding distances, scanning documents, and cleaning engine parts PLZ Help!!!!!‍♂️‍♂️‍♂️‍♂️

asked Feb 10, 2022 66.5k views

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