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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound2 Marks
Question
What is a stethoscope? Name the principle on which a stethoscope works.
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Answer

Stethoscope: Stethoscope is a medical instrument used by the doctors for listening to the sounds produced within the human body, mainly in the heart and lungs.
Principle: It works on the principle of multiple reflections of sound.

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