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प्रश्न
State two applications of echo.
थोडक्यात उत्तर
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उत्तर
The applications of echo:
- Dolphins detect their enemies and obstacles by emitting ultrasonic waves and hearing their echo.
- In medical science, the echo method of ultrasonic waves is used for imaging human organs such as the liver, gall bladder, etc. This is called ultrasonography.
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