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YouTubeKhan Academy India - English
Human ear - structure & working | Sound | Class 9 | Physics | Khan Academy
https://www.khanacademy.org/science/ncert-class-9-science Let's explore how human ears work. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and ...
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