Sound in One Shot | Physics - Class 8th | Umang | Physics Wallah
ฝัง
- เผยแพร่เมื่อ 23 ม.ค. 2022
- 📝 For complete notes of Lectures, visit Umang Batch in the Batch Section of PhysicsWallah App/Website.
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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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NOTE: This batch is completely FREE, you just have to click on the "BUY NOW" button for your enrolment.
🔴 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
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
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
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 😒😒
1 oscillation
Frequency=(total oscillation) upon (time taken) = 20/1 Hz
=20 HZ Ans pw best 😊😊
Hi
@@Sonam.5098hi
Hello
No. of oscillation=20
Frequency= oscillation/time period
20/1
=20hz
Thank you 😄
Aloki sir
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 🙂🎉
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 💀
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
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 :)))
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
Sir your explanation level is smart 😎😎
😊who watch in 2024😮😂
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.....,
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
25:48 solid
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😂🙂
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
😇❣️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😅😅
thank you physicswallah for sound topic phisicswallah=Sucess thank you somuch
20 oscillation per second is 20HZ
correct
Yes
Sir mera bhi ye answer hai
0
Yes
1 oscillation -1hz
Frequency - total oscillation/total time taken
=20/1
=20hz😊
Frequency=(total oscillation) / (time taken) = 20/1 Hz
Ans=20 HZ
Alakh sir's teaching style be like:
So beautiful
So elegant
Just looking like a wow.....😅😜😘😘
Thanks sir.....💓💓
It is one of the best platform in India ❤️
はい、その通りです
This like a teacher 💯 💯
sir ka sab lecture hame aur sabhi dost ko bhi samajh aa raha hai
Class 9th legends are watching this class8th lacture before starting sound chapter 😎😄👍👍
1 oscillation - 1hz
Frequency = (total oscillation ) upon ( total time taken)
=20 oscillation
= 1.hz
Ans. 20
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😅
10:02 😂😂😂😂😂😂
1second=20 oscillation. Frequency=Oscillation/Time taken=20/1=20hz.
Superb Explanation Alok Sir!!
1 oscillation=1hz
Frequency=(total oscillation)upon (time taken )
= 20/1 hz
= 20 Hz
Nice
Very good
😊
@@prshantgupta9180
Thnx
@@GautamKumar-11thanx
42:14 Frequency = 20
20Hz
Oscillations =20
Total Time = 1 second
Frequency = No. of oscillations
______________________
Total Time
F = 20/1
F= 20
Ans:= 《20Hz》
👍
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 😂❤💜
1 oscillation - 1hz
Frequency = (total oscillation ) upon( total time taken )
=20 oscillation
=1. Hz
Ans = 20 hz
Good, friend.
Yes 20 Hz 😊😊😊😊
Thank you so much sir 😊
0.23 i littraly thought that my speakeris ripped
1 Oscillation=1hz
Frequency=20Hz
44:30
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
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
No. of oscillation=20
Frequency= oscillation/(upon)timeperiod
20/(upon)1
=20hz (because SI unit of frequency is Hertz(Hz)
🙂🙂🙂🙂
Happy Birthday Alok sir.. you are op 🚩
Thank you sir 🥳❣️
Happy late birthday sir 😊😁. Your teaching is awesome.
Rakshak sir, Aapka Kab hai?
Sir you are the best teacher of India jitne tarif utni km hai ♥️♥️
Frequency = 1/Time Period
So,
Frequency = 1/20
= 0.05hz
Thank you so much sir for this video ❤️❤️❤️❤️. You are the best teacher in the world for me 🤗🤗🥰🥰.
42:22 frequency=Total oscillation/time taken
20/1=20(HERTZ)
42:43 20 hertz is the answer
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.💗
Thank you so much sir for always supporting us 😊😊🤗🤗.
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 😂😅
I have heared PW many times but I am trying it for first time and the experience is very amazing. Better than all study platform.🤗🤗
same
0.05 hz
Same bro 👍
Same
No
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
Nice chapter clear us paragraph wise complete
I like this very muchh "hello baccho"
Very Motivational
Really want to study from alakh sir 😀😀
Me too
Hii sir
Happy teachar
It's alok
@@binitasingh1512 I m talking about Alakh Pandey sir
Q ) 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 😊!!
Yes you are right 💯💯💯💯💯👍👍👍👍👊👊👊
Right 👍
@@arpitgiri69 clear your concepts first ....aap pahle formula toh dekh lo fir dekhna mera ans sahi hai
not time period time taken
frequency =no of oscillation/ time taken
=20/1
fequency=20hz
Frequency=No. of oscillations/Time taken
FREQENCY=20/1=20hz
Frequency = no. of oscillations / time taken
= 20 / 1
= 20 Hz
Answer
Sir, Please make the video of L-16 Star and Solar System
Sir,i am in love with your teaching ❤😊 thanks for teaching ❤
39:32
Thankyou sir chapter samjhane ka liye
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
Sir this just a fabulous class it works just before one day of exam 😅
16:00
Waves ❌ tornado ✔️
No. OF oscillation =20
Frequency =oscillation/time period
= 20/1
= 20 Hz
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
Bestest teacher of physics ❤
42:41 number of oscillation =20
8:51 🎉
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
Frequency= Total oscillations/ Time taken
= 20/1=20 Hz (Hertz)
Who is here from u.p❤ thanks sir maja aagya❤. Kis kis ko maja ayaa guys
Sound is a form of energy that travels in the form of vibrations through air or any another medium 🔉
👏👏👏👏👏👏👏👏👌👌👌👌👌👌♥️♥️❤️❤️❤️💐
My exam is tomorrow but I don't understand this topic so here I am at the last movement😅
At 48:40 I can hear-:“Paisa hi paisa hoga babu bhaiya...Paisa hi paisa”
😂😂
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😅
42:40 20 hertz
Good luck for tomorrow’s exam
Sir nice explanation smaz aa gya 🤩🤩🤩
42:00 is 20hz
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 ❤
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
Excellent teaching sir.
Thankyou sir for best explaining the chapter
Number of oscillation per second in called frequency
1 oscillation =1hz
20 oscillation=20hz
So, the answer is 20
😊
When the voice came suddenly in the starting it literally gave me a heartattack 0:40
1 oscillation =1hz
= 20 /1 hz
= 20hz
Sir promoted zomato in casual way
42:39
20
Thankyou sir for teaching us🥰🤝
Alok Sir 🔥🔥🔥🔥🔥🔥
Thank you sir 🥳🥳
Hi sir i love it your voice and my all doubt is solved😊😊😊😊
Frequency=number of oscilation \time taken😊 f=20/1=20hz😊😅😅😅
Me watching 👀 this video as tomorrow is my exam thank u so much sir my all doubts are clear🤗🤭
Hii
sound is a form of energy which produces sensation of hearing to ear
Thank you sir you teach best science
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 🙏🙏🙏