What is ultrasound? Mention any two uses of ultrasound.
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Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. ... Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws.
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the sound whoes frequency is more than or same as 20,000 hz......
Uses:-
It is used in dishwasher to clean the dishes.....
It is used to detect internal organs....
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