Sound in One Shot | Physics - Class 8th | Umang | Physics Wallah
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- Опубліковано 23 січ 2022
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▶️Complete CLASS 8TH - SCIENCE ONE SHOT Lectures - • Science - Class 8th NCERT
In this lecture of Umang batch, Alok sir is going to teach you the chapter-Sound.
Topics covered in this lecture are-
•Sound
•How is sound produced
•Medium of propagation
•Amplitude, Frequency, Loudness, Pitch
•Noise, Noise Pollution
There are many other important chapters that we are going to cover in upcoming videos for class 8. Stay tuned with PhysicsWallah Foundation.
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🔴 Details about the batch -
• Recorded Lectures for Class 8th Students.
• PDF Notes of each Lecture will be available on the PW App.
• Weekly Lecture Planner will be uploaded on PW Foundation Community Page.
• Classes will start from 10th January and we will cover the whole syllabus by 10th March.
🎦 Eight Lectures per week will be uploaded.
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#Science #Class8 #Umang
Who 🤔 is watching this in 2024😊
Iam
Me
Me😂
Me
Me
1 oscillation
Frequency=(total oscillation) upon (time taken) = 20/1 Hz
=20 HZ Ans pw best 😊😊
Hi
@@Sonam.5098hi
Hello
42:41 Nunber of oscillation = 20
Frequency = Totam Oscillation/Time taken
= 20/1Hz
={20Hz} Ans 😊😊😊
48:44 Paisa hi paisa hoga 😂😂
Pw is better than school 😂😂😂😊
48:41 Paisa hi Paisa hoga
Shai me yaar pw is better then school
@@kutkutjangid112 right ☺️
School ko chhod do😂😂
@@Nileshgreninja- ha but phir ye society nahi jine degi bolegi ki dekhi school chhod jar beth gayi 😒😒
Answer of the given question:
No. of oscillations =20
Frequency = oscillations in 1 second
Hence,
Frequency= 20 Hertz (since unit of frequency is Hertz)
And thanks so much sir for teaching so well 🙂🎉
Salute to our physics wallah teachers 👏👏
Sir is quite sick 😷 but still teaching us😊
How you now
he was coughing several times in the video madam@@dileeptiwari2075
Ya they were coughing
Sick yet teaching with SMILE
What is vacuum
No. of oscillation=20
Frequency= oscillation/time period
20/1
=20hz
Thank you 😄
Aloki sir
No of oscillation =20
Frequency= Oscillation/time taken
=20/1 = 20Hz
Answer = 20Hz
Thank you for teaching my all doubts are clear and your teaching method is wow 😊😊
42:31
48:36 the dialog is paisa hi paisa hoga....
And sir the answer is
One oscillation = 1 Hz or frequency
Then 20 oscillation = 20 Hz ....
Thanks sir.....
Love from bihar to whole ❤ PW tutors and facilities.....,
0:23 I literally thought that my speaker ripped off😅😂😂😂
😂
😅am also thought that my speaker ripped off
Same😂😂😂😂😂😅
I thought that it is muted for copyright😅😅..... and also fast forwarded to listen 😅😅😅😂😂😂
True
1 oscillation - 1hz
Frequency = (total oscillation ) upon ( total time taken)
=20 oscillation
= 1.hz
Ans. 20
1second=20 oscillation. Frequency=Oscillation/Time taken=20/1=20hz.
Exam ke ek din phele aake padhne wale like karo jaldi😂😂❤
sirf tu hamare jaise log nhi
Correct😂
1 din pehele nahi bhai 4-5 ghante pehele 😂😂
same @@dipalideshpande9603
Present
1 oscillation -1hz
Frequency - total oscillation/total time taken
=20/1
=20hz😊
Oscillations =20
Total Time = 1 second
Frequency = No. of oscillations
______________________
Total Time
F = 20/1
F= 20
Ans:= 《20Hz》
Frequency=(total oscillation) / (time taken) = 20/1 Hz
Ans=20 HZ
This like a teacher 💯 💯
sir ka sab lecture hame aur sabhi dost ko bhi samajh aa raha hai
20 oscillation per second is 20HZ
correct
Yes
Sir mera bhi ye answer hai
0
Yes
Alakh sir's teaching style be like:
So beautiful
So elegant
Just looking like a wow.....😅😜😘😘
Thanks sir.....💓💓
😇❣️All the best guys whose exam is the day after tomorrow or the day after. 💫
😊👍🏻
Actually I'm watching this today's night and tomorrow is my exam😅😅
How many of u are here to complete syallabus as fast as possible to enjoy the left months..... 🤤
0
Meh!
Baji same me bhi
Me
🤘😎
Na bro iam are here in my exams bcoz i enjoyed the whole season :)))
42:42 Frequency of object is 20. Because it oscillates 20 times.
20 Hz. HZ Is very important in exam
Thank bro directly frequency me laane k liye
Wah bete moj krdi
Class 9th legends are watching this class8th lacture before starting sound chapter 😎😄👍👍
Number of oscillation=20 frequency= total oscillation/time taken =20/1s =(20hz) its so so so easy 😊
1 second= 20 oscillation
Frequency= Oscillation / Time taken
= 20/1 = 20 hz
Because the number of oscillation made by an object in 1 sec is called frequency
My answer is same too
mera bhi yahi answer aya hai
20/1 is = 0.05 Hz not 20 Hz
@@lakshmiramesh33 No you can check formula
@@lakshmiramesh33 you are dividing 1 by 20(1/20) ... we have to divide 20 by 1(20/1) and which becomes 20 that means 20hz is the correct answer
Very helpful i appreciate it iam studying one day brfore exam because i was absent in many lecture but this video cleared all my doubts...
Bhai pta chal rha hai before bhi galat likha hai yaar tumne
@@RinkiTiwari-bi9dr thousands of languages but to choose to speak the truth😅
Nice explanation 👏,
I completed 8th grade 7 years ago, but still, watching this video takes me back. Videos by PW and other things on internet are easy for today's 8th graders to use. At that time, we didn't even know what a video lecture was 🗿.
Hlo
looks like a skill issue
@@pluto-lq4cnyes right
U don't know lecture😢😢. Ok senior
@@aqilahmed-ly2ze I discovered about LECTURES in 12th standard 💀
Thank you some much for expecting such nicely
But I also wanted the numericals from this chapter because in my exam there are numericals also
Like this is velocity and time now find the sound
Btw thank u
Ans:20
Because in definition of the frequency, they have written that ,The number of vibration experienced by a vibrating body is known as frequency
20Hertz
Try in hi Lee iq
In this Akshay Kumar said paisa he paisa 😂😅
42:14 Frequency = 20
20Hz
Your explanation is really really good..your way of teaching and the way you explain the concepts is also really good sir..thank you so much for such a great explanation.💗
Sir if sound doesn't travel in vacuum then how is the sounds of planet, stars and space found.
In space there are no air or particles which means there is vacuum
Sir
Last clip is "PAISA HE PAISA HOGA"
Thanks for good teaching 🙏🙏🙏
My exam is tomorrow but I don't understand this topic so here I am at the last movement😅
Sir your explanation level is smart 😎😎
😊who watch in 2024😮😂
Thank you 😊 so much sir.... for this type of explanation I read this chapter from one month but 😢I can't understand but I see this video I understand 😊 so fast again thanku 😊 sir ❤
Very pleasant video and very useful for back benchers for last days of exam
😂
But why back benchers come to see this video? They did not have time.
@@shayri_ff-loveri m also back bencher tomorrow is my exam and i want 35 makrks out of 100😅😅
@@fggyffffg9542me also
Yess😂🙂
Sir,i am in love with your teaching ❤😊 thanks for teaching ❤
Sound is a form of energy that travels in the form of vibrations through air or any another medium 🔉
👏👏👏👏👏👏👏👏👌👌👌👌👌👌♥️♥️❤️❤️❤️💐
Sar aapke vajah se mai class me top kar chuka hu 1th in calss😢😢😮😮😮😅😅😅😊😊😊😊❤❤❤❤
Sir, Please make the video of L-16 Star and Solar System
Sir this just a fabulous class it works just before one day of exam 😅
thank you physicswallah for sound topic phisicswallah=Sucess thank you somuch
What is Amplitude?
42:43 20 hertz is the answer
It is one of the best platform in India ❤️
No. of oscillation=20
Frequency= oscillation/(upon)timeperiod
20/(upon)1
=20hz (because SI unit of frequency is Hertz(Hz)
🙂🙂🙂🙂
Kis kis ko ye lga tha ki hamer phone ki awaj chali gayi
Yeah
42:22 frequency=Total oscillation/time taken
20/1=20(HERTZ)
Frequency= Total oscillations/ Time taken
= 20/1=20 Hz (Hertz)
Thank you so much sir you are no 1 Teacher for our physics Subject
25:48 solid
Me watching 👀 this video as tomorrow is my exam thank u so much sir my all doubts are clear🤗🤭
Hii
20 hertz by multiply 1 per sec x 20 oscillations is 20 times
I think the answer is right but the explanation is wrong
@@princetamboliya4599 hmm🤔🙄
@@Farhan_H cfghy
nice explanation sir, but i have a doubt that we have voice box/larynx so the sound is produced that's why we are able to speak but what for the people who are not able to speak?
They also have larynx but due to minar damage in their vocal box they can't produce sound
Sir wave length or wave speed pls
1 Oscillation=1hz
Frequency=20Hz
44:30
Sir you are the best teacher of India jitne tarif utni km hai ♥️♥️
Sir i am in love with your teaching❤😊 thanks for teaching❤
No. OF oscillation =20
Frequency =oscillation/time period
= 20/1
= 20 Hz
When the voice came suddenly in the starting it literally gave me a heartattack 0:40
👍
Superb Explanation Alok Sir!!
Paisa hi pasa 😂 hoga sir I must say you and all teachers are teaching us very deeply we understand clearly because all speech peace full and something funny so we understand clearly
noupee paiisaa hi paiisaa hoga babu bhaiyaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa uhhh.......................... actually thodaaa zyada hi hogya ..................butt koii na oyeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee.........................................................................................................................................................................................................................................bi
Thora paisa mere liye bacha ke rakhna
Finally fund that comment and yes u are right 😂❤💜
Happy Birthday Alok sir.. you are op 🚩
Thank you sir 🥳❣️
Happy late birthday sir 😊😁. Your teaching is awesome.
Rakshak sir, Aapka Kab hai?
Thank you so much sir for this video ❤️❤️❤️❤️. You are the best teacher in the world for me 🤗🤗🥰🥰.
48:33 Paisa Hi Paisa Hoga 😂
No. of oscillation = 20per sec
We know that no. of frequency is 20/1hz=20hz
Thank u sir for teaching
I have an exam tomorrow and u teach us very very nice
1 oscillation=1hz
Frequency=(total oscillation)upon (time taken )
= 20/1 hz
= 20 Hz
Nice
Very good
😊
@@prshantgupta9180
Thnx
@@GautamKumar-11thanx
First i didn't understand what is motion i am very confused then this video explain me very clearly thank you so much😀
Thank you so much sir 😊
Sir nice explanation smaz aa gya 🤩🤩🤩
42:34 As we know frequency= Number of oscillations/ Time taken
Therefore, frequency= 20/1 That is = 20 hz
Thankyou
PW is very very very very very good coaching
Maja hi maja hai last me akashay kumar apna sir guma guma kar bol raha haii 48:44
Akashay kumar be like mja hi mja haii legends ko ishra hi kafi hota hai😅
At 48:40 I can hear-:“Paisa hi paisa hoga babu bhaiya...Paisa hi paisa”
😂😂
10:02 😂😂😂😂😂😂
Sir promoted zomato in casual way
Frequency = 1/Time Period
So,
Frequency = 1/20
= 0.05hz
1 oscillation - 1hz
Frequency = (total oscillation ) upon( total time taken )
=20 oscillation
=1. Hz
Ans = 20 hz
Good, friend.
Yes 20 Hz 😊😊😊😊
Thankyou sir for teaching us🥰🤝
Thankyou sir for best explaining the chapter
Thankyou sir chapter samjhane ka liye
1 oscillation =1hz
= 20 /1 hz
= 20hz
After watching PW my all doubt is clear the way teachers explain to us is incredible
I wish they could teach us in our school whole class will top 😊
Sale chup
Nice one
Sach mein
hey sakshi
@@All_creater99 what
48:45 paisa he paisa hoga😂😂
Thank you so much sir for always supporting us 😊😊🤗🤗.
Bestest teacher of physics ❤
No. of oscillation = 20 times
As we know we can note 1 oscillation be 1 Hz
So oscillation be 20 multiply by 1 Hz = 20 Hz .
Thank you for studying 😊
,,,💚💚💛
No answers GA.zt ha
Nice explain👍
Right 👍
Actually the method is wrong but the answer is correct
Thanks a lot sir thank you so much for this video ❤❤
42:41 number of oscillation =20
If an object oscillates 20 times in one second , what would be its frequency ?
Frequency :- no. of oscillations per sec / time period
:- 20 / 1 = 20 hertz
Thank you sir for teaching us
Nice
Nic
do see my class 8 science channel
Hey everyone I'm from class 9 nd I got 94% in my term 1 nd 'm here to recommend u guys that ds chapter is literally important yeah although ds chapter is deleted from 9th syllabus bt if u will not study it clearly in 8th itself u will not be upto understand the 9th one nd if u will not get over the 9th one their is a chapter WAVE in 11th nd u will b not upto understand it ..so do study ds chapter nicely nd yep thanx for reading my comment:)Nd yeah it would play a gr8 role in NTSE exam too!
Literally pardon me cuz u 've wasted L'ill bit tym by reading my comment bt yeah it's gonna help u a lot..
thanks for warning us
But what do you mean by ds chapter please tell me full form of ds chapter 😅😅😅😅
And very very thank you so much
Mam
@@Anita_Kumari ds means this
Sir aapne jo 33:06 me air particle ka diagram banaya h vo galat h....
Kyoki air particle mean position ke aage jaata h or firse apni mean position pr aa jaata h lekin aapne kuch jyaada hi peeche kar diya...
But😂😂❤❤❤
Frequency=number of oscilation \time taken😊 f=20/1=20hz😊😅😅😅
48:30 hum ye samjh rahe ki ye lecture bahut achha tha or maja aa gaya kuch naya jaan ke
The entry was marvellous along with that hat's of you because of your teaching efforts of your's 😇😇😇😇😇
I was forced to use 1.75x to watch this lecture dear sir please speak a little fast !!!!
0.23 i littraly thought that my speakeris ripped
fr!!💀😂
Excellent teaching sir.
Ur smile is sooo cutee sir