9th Science | Chapter 12 | Study of Sound | Lecture 2| Maharashtra Board |

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Sir PLZZ make a video about proof for 9th standard. It's really difficult.

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how doctor passes the ultrasonic sound???

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Ultra Sonic sound is used in hospital Examples like sonography and other machines

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Sir sorry but you said in the uses of ultrasonic sound join plaster but that was wrong this is use to join plastic surfaces but it's okay we can understand thank you. sir you teaches very nice ✨🎉

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But sir in the gas the oxygen also comes then how it's the lowest traveling medium of sound ??

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