SELECT * FROM question_mgmt as q WHERE id=4250 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=192 and ex_no='11' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Sound give two practical applications of reflection of s

Question:

Give two practical applications of reflection of sound waves.

Answer:

(i) Sound navigation and ranging which is used to find the depth of the ocean. This method is known as SONAR.

(ii) Stethoscope is used by doctors to measure heartbeat. Dr. is able to hear the sound due to multiple reflection of sound in the stethoscope.


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  • Answered by Ekta Mehta
  • 4 months ago

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