Sound | Production and Propagation of Sound | Class 9 IX CBSE Science | Toppr Study

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Practice papers banaye na plz sir

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Abay haat

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thank you sir i have scored 98% in my annuals in science i have seen your every video

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Itna mat phek gadhe

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Chal jhutha😂

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Basss

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Sir always uses "STUENTS" in every sentence. 😂😂😊😊

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Yes

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Right

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No one teacher is taught more awesome than u... Fantastic sir Thank u

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Sir, I studied from many teachers but there are none of them explained the concepts better than you.... You have a very nice way of teaching.......

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Yes sir I am also agreed

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I also agreed

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Education Hix se ek bar phad ke dekho .

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Ya see it too

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Aise hi teacher chaiye sabko sir🤗

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Thanks, Kalpna.

[@randomshortswallah..5380]

A : -art of understanding students L : -love for all A : -art of teaching K : -kind hearted H : -hero of youth generation ...

[@umashankarprasad8329]

Sir, Your teaching by using animation or sticker is very understandable for us ... Thanks for it Keep going it 😀😀😀😀

[@nayatrisinha1145]

Such a wonderful session ... I loved it ... It's very nice I would like to thankyou topper and obviously sir for teaching in a friendly way😀

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You are always welcome. We are glad that you liked the session. Keep watching our Class 9: Complete Science preparation playlist kzbin.info/aero/PLKb9HOyS0VGQ9I9YYgaaKeGdzFCJg5iYs. Do join our Telegram bit.ly/TopprStudy

[@sonalilahiri5094]

To respected sir, Thanks for gives us a such type of quality education .

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Very very nice and effective method of teaching.I understand fully.👍👍👍

[@abhayamallick9328]

👌👌👍👍☺️☺️😊😊💐💐

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[@urmilakumari2519]

Thank you sir your teaching style is amazing.

[@satendra9614]

Sir your teaching way is very nice 👌👌👌👌 I like it

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Thanku...u r an awesome teacher...

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Sahi baat h bhai

[@uniquemaths6804]

You are best teacher for 5 to 10th classes students .I never seen this type of teacher. You language is very interesting.

[@harshitamehta8437]

Sir you explain the best.. ❤🙏👍 Thank you sir!! 😎

[@drishikas10]

amazingg sir. the way you explain is incredible!! can you please answer this question: when two persons travel on a scooty or bike the person sitting behind is not able to hear the voice of the person in the front. why?? please answer sir.

[@themotivatorji3070]

Yes

[@Multieditsx3055]

it is because the person in the front covers the way or passage of the man behind him that person took all by himself ok understood.

[@themotivatorji3070]

@@Multieditsx3055 yes correct

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I Really Like your Style, Because You are the best sir on youtube. I like this video 😍 Thanks 👍🏻

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So nice of you. Do watch our Class 9: Complete Science preparation playlist kzbin.info/aero/PLKb9HOyS0VGQ9I9YYgaaKeGdzFCJg5iYs. Do join our Telegram bit.ly/TopprStudy

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"Student" count - infinite

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Hubby

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Bhai sahi bole

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Yes bro

[@amanchauhan3281]

Sir tommorow is my science test now i can freely do my test because of your explanation thank you sir so much🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@arifarafat7149]

sir your video help me a lot and made me easy to understand.sir i request to you please upload all video of std 8 because i am student of std 8

[@ketanbhardwaj509]

Amazing style of teaching and also very easy to understand.

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[@rajshreedodwani8504]

It's so helpful sir...Thanks a lot🙏

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Very nice. Teaching method is amazing🥰🥰🥰🥰🥰🥰🥰🥰

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I see your all the videos of class eight because your experience for science is extremely excellent

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[@NAYAN-t3e]

• Some facts about sound - 1) Mechanical/Electrical energy is transferred in the form of elastic strain energy of a medium in the form of vibration propagation in continuous medium. 2) As elastic as medium is, the sound propagates with minimum attenuation. This is also supported by the density of the medium. 3) Sound propagation is completely the form of mechanical energy of material medium whether it is solid, liquid or gas which responds to it elastically the disturbances. 4) Higher the frequency of sound is, fast is its propagation speed. It is as quick as continuous to hear or transmit. 5) Loudness or intensity of the sound is its the rate or flux to transfer the acoustic energy on unit area in unit time. Amplitude is the proportional factor. 6) Solids are quick & strong responsible for sound to propagate & reception. Comparatively, Gases are the least to responsive for sound. This is because the proportional effect of the elastic modulus relative to compactness of medium. 7) Temperature is also affecting the propagation of sound. Here, gases are significantly responsive to this effect because of affection on density & pressure in the medium. 8) Sound waves are longitudinal mechanical waves which requires material medium to propagate parallel to the vibration of molecules. They doesn't travel through vacuum. 9) Sound waves or energy is propagating in all directions. This means it propagates the energy in the medium equally irrespective of any directional effect. External intervention is done if it purposely to propagate in desired direction in medium. 10) Acoustic capability of a medium is depends upon the range of frequencies or maximum frequency (Natural) it can handle or sustain to propagate without attenuation or dissipation or structural failure.

[@ramuumarkar9398]

Sir when you teach. I understand what is sound.

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[@nitenlowmind4879]

Sir,Your explanation is very well for understanding 🙏🙏🙏🙏😉

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[@Clashbarb09]

Very good teaching personality sir😃😃😃

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Thanks, Aayush.

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👌👌your teaching style was amazing

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Thankuuu sir for clearing my all the doubts....😊

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Sir you teaches a uniqe why and teach very very well... Thanku sir for this good and a unique way of teaching

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Very nice video. Thank you sir 😀😀😀😀

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Very nice ! Brilliant ,outstanding, great ,majestic, terrific, excellent, superb,awesome... Good job!

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Wooww... Rajat great words..... thank you so much. Keep liking us & also share it with others too.

[@rajatdeendayal942]

Respected Sir, please complete this chapter. There are other concepts also which you should clear with other videos such as characteristics of sound , compression and refraction etc. Please my lord and you should make videos like this video that is in front of us ,it gives a feeling of classroom.

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Sir,fantastic.

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[@SagarKumar-kh6ii]

Thanks sir for giving broad knowledge about sound (vibration) it helps me for my beast prepration.🥰🥰😍😘

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What a teaching. Sir your teaching way is osm 🙏🙏🙏🙏😍

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The technology of your videos is very good

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Thanks a lot.

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Nice sir we can easily understand by the graphics nice explanation 👍

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Thank you Sir It's Amazing Explainesion 💓

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100 times better than any teacher. Fully energetic video

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Awesome explanation... 🙂🙏

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Sir your study style is so beautiful 😍 I UNDERSTAND all this...thanks sir

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Sir 🙏the way of teaching and explaining is very very prefect

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The starting of this session was just amazing, mindblowing.... Thankx a lot ...sir

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Thank you sir for clear my doubts ❤️❤️❤️❤️

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A : -art of understanding students L : -love for all A : -art of teaching K : -kind hearted H : -hero of youth generation ...

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Sir aapko aur aapke teaching method ko heads off

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Thank You so much sir. You teach in a very good manner. I now understand everything.

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Chal jhutha 😂

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I am agreed with you

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Thank you sir no one can teach like you

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Sir good spirit of teaching 👏👏

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Sir you teach very well 👍 Keep it up

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Sir congratulations 👍👍 👍🎉🎉🎉 for 1 m subscriber

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Sir Your voice and teaching style is excellent

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Sir make more such videos . It is very helpful.

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Big fan of your teaching

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Hi

[@muktagirish9372]

Very..... useful video.i haven't words.thank you very much sir.

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I must say.....Sir u r commendable.. .thnx a lot sir , it helped me alot

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Thanks, Kunal....

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Even I am not student of CBSE class 9...Still I am watching your video because you teaching is very very great 👏💖.....

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His teaching explaination is best 👍💯

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Amazing experience sir🙏

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Sir ur way of teaching is amazing 😃😇

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just one word for this teacher.......damn amazing.......

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Yes

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but its two words

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And also sir... You are shouting very... Loudly🤗🤗

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Very nice sir..... I help me alot for my next 🎥

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Hi

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Mr Indian haker I am great fan of you.

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I have watched a all videos

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he is not mr India hacker bro

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Such a super awesome teaching way...this u tube channel deserves more than a million subscribers

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Really 🔥🔥

[@shoaibphysicswallah7063]

Nice sir. Q:-(1)sound is which type of energy.....,???

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Your way of teaching is outstanding

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What a teahing style !😯😯😯

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Sir please free puri videi do aapko youtube se paise mil rahe honge

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Amazing👏🏻

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I can understand how you work on us to easy our study 😎😎😎😎😎😎🤗🤗🤗🤗🤗🤗🤗🤗🤗🤗

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Thanks, Angita.,.,

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Thank you so much sir Your every video is very important I most likely your video

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[@shortsfun746]

Sir if we talk in the presence of air , water and solid , then how can we talk on the phone ? In which medium we talk by mobile and how the satellite transfer the sound of one person to another . Please, explain it sir .

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Ossam sir your are best teacher 👩‍🏫‍amazing😍😍😍😍😍🤩🤩🤩🤩🤩🤩👍👍👍👍 I have no words what I tell to you super❤❤❤❤❤

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Nobody can teach like you💯 you are a gem :-)

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[@arshali1725]

U r right