GCSE Physics - Sound Waves and Hearing #73

This video covers:
- How sound waves travel through materials
- The idea that sound waves are longitudinal
- How wavelength changes with speed
- The structure of the human ear and how it works
- How the range of human hearing changes with age
Exam board specific info:
AQA - Separate/triple science and higher tier only
IGCSE Edexcel - Not really in your course (apart from the fact that human hearing is 20-20,000 Hz)
Edexcel - Separate/triple science and higher tier only
OCR 21st Century - Separate/triple science and higher tier only
OCR Gateway - Separate/triple science and higher tier only
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video

[@user-ml3mg3xs1u]

I swear this is the easiest explanation I've seen in my whole educational career.

[@zxckx101]

Sem

[@jeffappleseed9489]

i dont agree tbh

[@dillonverlander6881]

My school has forced me to watch this

[@elnaby]

same

[@thepokemonbiatch3602]

Same but its a good video though

[@rfhl16]

same

[@john__1879]

Same HAHA

[@lauraalawadhi2522]

Same😭it’s torture

[@ankitas.k6901]

I love the way you explain everything, physics is soooo much simpler now thank you so much

[@rajvirjohal-jk2gp]

It’s good no problem

[@nadeeshaniperera5896]

our physics teacher is making this lesson sound super complicated ...But you just made sound very easy thanks a lot your videos are really helpful

[@fshahnawaz]

When are you making a video on Doppler effect? The way you explain is seriously getting me addicted to this channel while exams are coming up 😁😋

[@user-hm3gk8bg6m]

Been watching you throughout my whole secondary school journey and todays the last science gcse

[@gfcdfg3429]

when are you making a video about the generator effect, btw u have the best science gcse channel in my opinion.

[@mwayimhango4119]

Your videos have been very helpful to me at home and while studying

[@Cognitoedu]

If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_4.16. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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[@taonanyashakufakunnesu6007]

Simple, accurate and helpful. Love it🤙🏽🤙🏽

[@mathewjohn8126]

So crispy. Subscription done Sir. Am a Tutor turned QC Chemist and takes classes upto plus two students. You did a smooth job. Exam notes nearly. Awaiting the next

[@user-xr6gl6zb4t]

wtf

[@yousefsamaha5176]

Thank you so much for this explanation. 5 minutes of this video covered a lot of lessons at my school. Thank you

[@TheScentBoy]

I am failing tomorrow 😂

[@mr.shahidgaming9637]

Same 😢

[@airqx2808]

oh quarantine how nice of you to make me watch this i'm just so happy

[@airqx2808]

@@ayaanhalim1213 no

[@master4755]

May I ask when you started to make videos for GCSE? - Love your vids!!

[@marcelachew2821]

Sgt. Harrell Middle School Mercedes, TX Carl....we loved to hear you say ROAR! The BENGALS at Sgt. Harrell always ROAR!!!! Go BENGALS! Be Strong, Bengal Strong!

[@mohammadnusair]

What Bengal are you talking abt

[@user-pg9kh3bv2k]

Love this! Its so simple and fun to takes notes on. 💗

[@mohammadnusair]

Yes, I agree

[@BTS.Army_7]

That was the best explanation I have ever seen in my whole life. I feel like no other teacher can explain this as good as you! I'm so glad I found a vidoe like this! Thanks so much

[@Musicisforever0]

This helped A LOT thank you

[@mohabshap6234]

Thank you so much

[@marxcarton3858]

Hmm i feel like u should start a website

[@shaashwatlabde]

This video saved my time

[@alethbaccay1112]

this made a lot more sense than my teacher explained it oh btw I passed my exam because of this

[@Cognitoedu]

Nice one 👊

[@starvingafricankid1275]

im dissapointed you shouldve done more then pass

[@duckyrikii]

u jst made this chapter a whole lot easier!! tyyyy

[@MysticScorpion]

This one was quite extraordinary indeed! my favorite possibly!

[@gharkakhanagkkinpeahawar7604]

Best channel ever All physics here

[@henryhsil8630]

Why frequency remain constant I wonder?

[@RE_EL224]

i just heared that the new bench will be doing igcse exam in year 11 not 10 which is like instead of doing on 2026 they'll be doing on 2027 for those who are in y8 this year is that true?

[@Shortness.]

Best channel, i have my physics exam tomo, wish me luck

[@Divviiii]

I got an exam tomorrow. At this point, it's 1:00am and this is a lifesaver! Thank you @Cognitoedu!

[@swaralivaze6516]

thank you soo much you have helped me a whole lot

[@user-FUCKYALL]

i finished my chem exam. it was amazing, all i did. was watch 10 of these 7 min vids and it got so easy, tomorrow is my phys exam. repeat!!

[@dr.yogurtyoshi3655]

@cognito your playlists of all sciences and maths are extremely helpful however im wondering if maybe you can separate the playlists into unit 1/year 10 and unit 2/year 11 if you cant its fine.

[@starvingafricankid1275]

wait your sayying you give cies at 11grade?

[@kidonly3041]

Thank you so much this helps a lot!!!

[@MuhammadKashif-zu7ll]

Awesome teaching 👍👍👍👍👍

[@cixt]

i have my final physics text in 30 mins and i need to learn this

[@thehunterwr4666]

How'd it go

[@gsn-in6ep]

@@thehunterwr4666 terrible

[@thehunterwr4666]

@@gsn-in6ep bro how do you know lmao

[@gsn-in6ep]

@@thehunterwr4666 this is my second acc i was revising and came across my own comment

[@thehunterwr4666]

@@gsn-in6ep nice. Why'd it go bad tho?

[@ahmedsayeef3691]

Explain Doppler Effect. Facing problems understanding that.

[@burls78]

Perfect - brilliant

[@elnaby]

Lockdown lessons

[@majak2188]

Elnaby omg it’s my favourite youtuber

[@itsmaryam3378]

I do feel like this is more KS3-KS4 but this was a really good explanation!

[@marxcarton3858]

what kind of name is Maryam

[@abcdefghijklmnopqrstuvwxyz937]

@@marxcarton3858 is marx even a name? lol. also who are u to judge other people's names??

[@aminahh_]

​@@marxcarton3858 Maryam is a name that dates far back. It's the Aramaic form of the name Miriam - from the Bible. Chapter 19 in the Quran is called Maryam and it's about Mary, Jesus' (Isa's) mother. The Quran dates from 610 CE, and the name is used in many cultures. The name is beautiful and has been used for a long time, so having judgment against it, or even any other name, is so disrespectful to the origin and person who posses' the name. Take that as a lesson ''Marx Carton''

[@marinKem]

@@marxcarton3858 alr carton of Marx

[@lukeroberts3464]

What happens if you put bloggers into your eardrum will it effect your eardrum or should it be fine?

[@user-ct2bn7md5x]

what do you use to make these vids?

[@kaylinbphillips]

Thank you

[@sapphyy2826]

do we have to know about the fluid in the cochlea?

[@klintg8464]

The more density is in the medium, the faster the sound travels through them. That’s why sound can’t travel at all through vacum. SPACE FOR EXAMPLE As sound waves pass between different mediums and speed up or slow down, their frequency doesn’t change. So we can use the equation V= fλ Wavelength gets longer: As sound speeds up. Wavelength gets shorter As sound slows down. Sound can also be reflected and absorbed, in hard surfaces most, and this gives us echos

[@guava-pubgmobile4024]

sweat

[@elishawhite7487]

When you say edexcel triple and higher does that mean combined science higher + triple or higher triple science only?

[@aysuzquirkyesse]

Which medium does sound travel the *farthest* ?

[@Countdown420]

Your mother’s bedroom walls cause its so loud😵

[@nightsky4262]

solids

[@lujixcjml]

time to get ahead of my class hehe! >:)

[@kanyanerevival9455]

He coverd everything in 5min😮😮

[@GtAclips099]

@cognito pls make a video on doppler effect

[@miraayasserr]

its the redshift video

[@phantomzaineventmaker]

Thx I passed my exam

[@serenity8666]

babatunde is here for a science lesson on teams

[@aestheticarmy3689]

i love you

[@bhairavasingai-hy4id]

i subbed to you man Thx

[@SCP-MTF_Resh1Rayan]

Bro my teachers complicate this way to much it’s just so simple

[@dishantzzzz]

What is the speed of sound in air

[@maryam-hk4ob]

Can you please include cie syllabus

[@thepaperempire7954]

dope

[@pixiemeat862]

If you only would upload a video about echo and sound at different temperatures then it would've cover up my whole chapter:']

[@Gacha_x_Misty]

Same :)

[@Gacha_x_Misty]

:’)

[@SouthKorea-pi6jo]

My school force me to watch this and make Questions!😭

[@Aesthetickpop-g2f]

This is really good I passed my exams becs of youu thank you soo muchhh your videos are so entertain whenever I feel unmotivated I watch your vids then I'm good to go once again thank you soo much😊😊😊

[@dreamsstory116]

Exam in eight hours, the teacher is so bad we all just sleep in her class and checks our exam wrong I got 97 she let me become 81, after I told her that she is wrong, she said fine I will change but you are wrong.

[@user-iu5sd5jx5e]

frequency decreases when wavelenghth increases

[@youssefmahmoud9409]

The teacher let me watch it

[@cortwill4085]

👍👍

[@reecelawson4718]

Hi bud, would you be able to explain how sound is absorbed by materials please?

[@peanutplayzzz5571]

it causes the particles in that material to vibrate which then causes the other particles in this material to vibrate and so on

[@user-cz8py5vl6x]

a

[@czx6677]

sino dito yung mga nanood kasi kailangan nila sa science hello same tayo:>

[@skulzz8137]

diba

[@user-cz8py5vl6x]

😴

[@alexroberts3828]

im being forced to watch this by my teacher im in y7

[@prolegoss7014]

same lol

[@BTS.Army_7]

Omg haha same🥲😂

[@shaiyoanthayaharan9834]

It was not that simple in class

[@abcdefghijklmnopqrstuvwxyz937]

69 comments loool

[@gauthemhemchander746]

first

[@gamersquad3846]

I HATE HONEY SO WHY ARE YOU SPONSERED BY HONEY

[@laibajd1299]

is he suppose to care about you not liking honey smh?

[@gamersquad3846]

@@laibajd1299 well i`m sure that a lot of people hate seeing the honey advert every day but since your different than the rest of us you probably watch it on repeat, so i dont know why are you caring about MY STATEMENT

[@laibajd1299]

@@gamersquad3846 omg you did not just say this how dumb can you be......AINT NO BODY CARES HOW MUCH YOU HATE THE AD IT PAYS HIM LIKE HE DESERVES GO CRY ABOUT IT

[@gamersquad3846]

@@laibajd1299 It`s not about the money its about entertaining the viewers so out of the 171,476 words in the English dictionary none of them describe how dumb you are for thinking its all about the money. if they cared about the money there are many jobs in the world they are capable of becoming. So go weep and moan about it somewhere else you Karen, its people like you who don't have any source of income so you get jealous of other people. SHM