Coffee Cup Vibrations - Numberphile

Tadashi explores coffee and tea cups to new depths...
More links & stuff in full description below ↓↓↓
Playlist of Tadashi Tokieda videos: bit.ly/tadashi_vids
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Videos by Brady Haran
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A NOTE ON THIS VIDEO:
A few of our Tadashi videos blur the already blurry line between mathematics and physics... Some people suggest they may be a better fit on Brady's dedicated physics channel (called Sixty Symbols).
In response, the reasons they are on Numberphile are:
1) Tadashi, while certainly a modern polymath, is based in a mathematics department.
2) This sub series (with its animation and extra production work) has been supported by the Mathematical Sciences Research Institute, a Numberphile collaborator.
3) Some of the previous and future Tadashi videos are more math-oriented than physics - and it just makes sense to put them on one channel rather than dividing the series between two channels on an ad hoc basis.
In a multi-disciplinary world, it is challenging to run KZbin channels which people come to associate with just one discipline.
That said, feel free to go over and watch hundreds of physics videos on Sixty Symbols --- / sixtysymbols

[@Robin_Nixon]

I love how just as the Professor explains something you immediately see where he's going and a whole load of stuff you never thought about before suddenly makes perfect sense.

[@slendy9600]

same. excellent teacher he is

[@bgezal]

He was very elegant about the "what is sound?" sidetrack. A concise explanation and then swiftly back on track again.

[@Louis-fh4sh]

Yeah he basically explained the whole concept of sound in around 20 seconds, it was impressive x)

[@fossilfighters101]

+

[@OhSoUnicornly]

I don't find him as interesting as the other people on this channel, but you're right... His explanation of sound had me going, "wow, sound is just how we perceive tiny, fast movements in the air, how weird is that? What if we could do that with all air movements? We could 'see' everything going on around us, without our eyes".

[@willfreese]

Because of Tadashi, I am now aware of the very low musical quality of my mug. It is almost as if the manufacturer wasn't thinking about tone at all.

[@samuelthecamel]

What manufacturer would forget about tone?

[@aurelia8028]

How dare they! You should never buy a cup from them again xD

[@unrealnews]

How would apple design a coffee mug?

[@Triantalex]

??.

[@LangKuoch]

Tadashi is the only man who can get me interested about cup clinking

[@LangKuoch]

also, heehaw heehaw

[@reasons4171]

Lol

[@perussi_gaming4459]

MOAR TADASHI

[@lx4302]

Useless stuff boss level

[@aurelia8028]

@@LangKuoch Hahahaha

[@jacobh1995]

6:00 "Heehaw" Take notes, guys, this some scientific stuff.

[@goldjoinery]

Wom, wom, wom.

[@ZNields]

I laughed so hard.

[@fossilfighters101]

+

[@Schobbish]

This is why we love him.

[@Schobbish]

Hasnain Hossain double comment warning

[@mikosoft]

Whoooom Whooom vs heehooheehoo - that just made me roll on my office floor laughing loudly

[@baranxlr]

Japan...

[@baranxlr]

*insert nuke joke*

[@somberyu]

+Baran Hekimoglu Oh no, not the nuke jokes! Must... resist... This is why you don't nuke a country twice. Goddamnit!

[@CaseyShontz]

mikosoft this one goes W H O O M M M M M M M W H U M M M M M M M W H O O M M and the other one goes *heehawheehaw*

[@Chewychaca]

Full 6:00 . Whoom 6:03 . Heehaw 6:09

[@leckam]

it was inevitably, I immediately went to my kitchen for a cup and try it... and after hearing it! I was smiling like a kid!

[@numberphile]

+Leckam nice work

[@lalalalalalalalal567]

I really wanted to go to the kitchen halfway through the video hahahah

[@msolec2000]

I did the same!

[@mrcob8453]

hi

[@d3vitron814]

Hundredth like (You're welcome)

[@kellen_mcsmellin]

Tadashi's sound effect for an unweighted spring kills me

[@Nobody-Nowhere-Nothing]

Kellen Dooley Sounded like doodle-bob from SpongeBob. "Mihoy-NINOY"

[@Triantalex]

sad to hear that.. RIP in peace yo..

[@ChrisChoi123]

I guess you can say he sure "handled" that problem really well.

[@fossilfighters101]

Go home Chris.

[@ankitaaarya]

fossilfighters101 😂😂😂😂😂😆

[@aurelia8028]

Urrrrrgh...

[@chriswebster24]

Get out!! 🤬

[@PC_Simo]

Going with the puns, like Tadashi, eh? 😏

[@AlanKey86]

0:41 Jaws theme!

[@branthebrave]

...Or New world Symphony

[@SuperAngryPacman]

If anyone's wondering, the lower pitch is E6, and the higher pitch is a semitone higher, F6.

[@SuperAngryPacman]

And the tiny cup with three handles produces somewhere around an A6, and a slightly sharper A6.

[@wazul7676]

Just wanted to point that out as well. :(

[@gabelance1]

Ah, so it is. Do you have perfect pitch?

[@stefanilserbo2]

Did you find it by hearing or using some sort of instrument? It's really cool. Also, is it possible that the recording changed the pitch or it is mostrly always the same, even if recorded?

[@gabelance1]

***** I'm exactly the same way. I can identify most pitches fairly easily (E and F being two of them), but other notes are harder. I think B is probably the hardest one for me. Which is kinda funny, because B flat and C aren't too difficult

[@realcygnus]

this dude is always awesome.

[@fossilfighters101]

+

[@tiuk23]

6:04 Made me meditating.

[@LaGuerre19]

Causes a lot of problems. His classes are AA (always awesome) meetings.

[@maldoran9150]

Prof. Tokieda always manages to find a topic that is both easy to get into and interesting to delve into. Fantastic teacher. And thank you Numberphile!

[@98DSi]

Tag yourself I'm the spring sounds *wuuOMMB WUOMmmb* _hiiho hiiho_

[@noahzuniga]

this guy is excellent at explaining things

[@blue0eyes6]

I like the accompanying animations. Really helps me to understand the concepts

[@brothas]

"Since we're talking about the pitch .., let's imagine ourselves in a pitch dark room" 10/10 Tadashi

[@lebumbcrack7248]

never clicked on a video faster in my life love Tadashi

[@adrenaldarknes3916]

I just about spewed out my coffee when he made the 'hee haw hee haw' sound effect for the little spring. Caught me off guard lol.

[@geometrydashninthlyfe5711]

6:40 "Pitch dark room" Nice pun!

[@DrunkenHotei]

11 people broke their coffee cups attempting this.

[@InkEyes]

I didn't even know that different points would have different pitches! I was blown from the beginning! lol

[@snubbelbuff1471]

I've wanted to understand this for so long!! I can die now! Thank you

[@toad2390]

Hi

[@dave5194]

that can be arranged....

[@TheTechBite]

+David -flamingsword1 The authorities are on the way to your address.

[@Spiderboydk]

That escalated quickly.

[@homerotreto9391]

Just give me a call. I know people...

[@Conguy97]

when he made the sounds of the springs it killed me

[@Nugglashine]

Tadashi Tokieda is so charming and charismatic. Very relaxing speaking voice. I could listen to him all day.

[@hesgrant]

Tadashi never fails to teach me something new in these videos. Awesome stuff guys!

[@DonGeritch]

whoom whoom - said one spring heehaw heehaw - said the other

[@topheye6318]

My intellectual crush: Tadashi.

[@fossilfighters101]

Me too.

[@feynstein1004]

Toph? Aren't you supposed to be blind?

[@topheye6318]

Love is blind :^)

[@feynstein1004]

***** Hahaha win

Make a new instrument by adding different size consecutive handles to a mug.

[@Sax4565]

Or slidables handles and hammers like on a piano :D

[@mistymorning2967]

Would it work if you just melt wax and drip it on one side of the cup and let it cool? More wax=lower pitch. And if you dripped wax to every 90 degree side of the cup the difference in the 2 pitches should be greater than if you just dripped it on one side, right? Could be a fun little experiment.

And a very affordable one, we should try.

[@aedric]

I'm a Potter, and if you send me your PO box I'll send you a 3 handled cup, 5 handled, whatever you'd like!

[@s0me1up]

i guess you will create those cups with your wizardry...

[@StephenTack]

Only while foregoing visits to the barber.

[@topstitchgirl]

You could sent it to his attention at Stanford's math department :)

[@topstitchgirl]

Aedric Donovan Just know that his full name is Tadashi Tokieda.

[@hsterts]

From a recent video, a three handed mug was demonstrated to be homeomorphic to a torus with three holes which is homeophoric to a hole in a hole in a hole

[@azyfloof]

Literally paused the video at the 45 second mark, then rushed in my kitchen to try this :D I don't know why it surprised me so much that it worked!

[@mienzillaz]

"Tadashi, stop playing around and finish your coffee" - Tadashi's mom

[@MrJPEzra]

Tadashinis flippin’ crazy. He has the weirdest yet most brilliant demonstrations. I am so enamored by this man.

[@donkeyfacekilla1]

Love this dude always get excited when he pops up on the channel! Excellent video!

[@algaedrone1833]

Thanks! I want to watch nothing but Tadashi's videos every time I'm on youtube!

[@bouncingbeebles]

I love Tadashi's explanations! His voice is so calming too!

[@pacedelacruz4913]

Riveting! I so much appreciate all of your videos. Thank you so much for ALL of these.

[@snortymcsnortface]

I just absolutely love wathing Tadashi, he has a certain angle he approaches with the information.

[@richardnixonshead]

Tadashi is amazing. Every explanation is crystal clear, and he makes any subject absolutely fascinating

[@David-ey9tg]

I always love videos with Tadashi Tokieda. I hope there are many more videos with him in.

[@ckannan90]

His choice of words is always so delightful!

[@robertocastillo1471]

Impressive explanation skills on Brady's side as well. Amazing animations and great editing

[@catastrophis]

I really like this guy, I'm glad there have been so many videos with him.

[@c2ashman]

Could watch and listen to this guy all day. Please make more of these videos. Very interesting topics.

[@2010rix]

I never noticed this...really like this guy...always blows my mind 👍🏼

[@wixic111]

I love the way the Professor talks, it is just so engaging

[@sophia6861]

I love how the professor always explains things so nicely

[@Imagine-Baggins]

How about hexaflexagons (and other shapes of flexagons) in a future video? I feel like Tadashi would really be able to do something cool with them.

[@goldjoinery]

Tadashi and James Grime should do one together, since James specialises in group theory!

[@raymondrogers3797]

I would love it; I never did the association! I feel ashamed; treating hexaflexagons as a compact toy for all of these years (::

[@snowgw2]

Tadashi is such an excellent explainer. He just entertained me for 10 minutes with nothing but a spoon and a cup...

[@nesagljivic]

Prof.Tadashi's "lectures" make my day!

[@anerky]

He has a brilliant way of bringing out the mathematical properties of the everyday in a non-trivial way, while maintaining intuition.

[@oiytd5wugho]

That's my favorite kind of science right there!

[@iworms]

I love this professor, always finding interesting topics in everyday things!

[@fierydino9402]

The animations are also awesome. The last chime is indeed beautiful 😊

[@iamnobody8979]

The recreation of the logo on the cup was spot on.

[@xilingsinqueso]

Excellent. Totally love this!

[@EvilAcidUK]

Tadashi-San videos are always amazing!

[@dft0011101000101001]

Love seeing cool phenomena like this emerge from every day objects and experiences. Great stuff!

[@scottwanthony]

This video was amazing.

[@pudicio4895]

Love this guy, always has crazy stuff!

[@helloworldpoland]

Thank you and more please!

[@phillipsmith4979]

Love these talks

[@TommiHimberg]

This is brilliant! A great, easy to understand demo and explanation of the inverse problem. The inverse problem is indeed everywhere in science, e.g. in brain data analysis. The electric or magnetic field pattern the EEG or MEG (respectively) measures from outside the skull can be a result of infinitely many different combinations of sources in the brain, yet we usually want to know where in the brain the acitivity comes from, which requires a solution to the inverse problem. Basically, given the measurement of pitches, we want to figure out where the handles are in the mug. Thanks, this demo will be useful!

[@TAP7a]

The vocalisation of the heavy and light springs was just... so perfect

[@ToTouchAnEmu]

I'm really enjoying this Tadashi fellow

[@noblevi3623]

Gotta find your cup with three handles? Big Rigs has you covered.

[@noblevi3623]

***** You're winner!

[@ThePaull3d]

+Noble VI late for work? drive backwards through the buildings!

[@unreal-the-ethan]

So has Cliff Stoll.

[@petarbul]

My favourite Numberphile video so far. Please post extras (I know it's 11 minutes long and there might not be any).

[@pmcpartlan]

Tadashi's explanations are usually really fully formed and to the point. The only major thing I cut was a short explanation of why the cup want's to maintain it's volume, short answer: it takes a lot of energy to distort the cup like that.

[@MindCraft4You]

Such an incredible video. Keep up the good work guys.

[@Afrikoe]

I really love this guy.

[@jakejakeboom]

this guy's accent just makes me happy, it's so soothing

[@arnauarnauarnau]

Wow this is one of the nicest explanations I've ever heard for inverse problems

[@julianjimenez4046]

Great animations! They really helps to understand how the things work. :)

[@yaerius]

I love professor Tadashi's sound immitations :)

[@otakurocklee]

This was really awesome!

[@atorrance]

Man Tadashi has always been my favorite guest on Numberphile and he never disappoints. More Tadashi!

[@hrwise89]

Tadashi's point about the inverse problem with the cup is very profound and enlightening. From our point of view, the pitch of the tapping makes sense, and seems to be governed by reasonable and straightforward principles. But someone with just the pattern of sounds might never be able to determine where the handle is. It shows that there are many things we have observed in the sciences that can't be explained intuitively, and that they will require additional observations from different points of view to paint a clearer picture. Very cool!

[@lasagnahog7695]

Seeing a new Prof. Tadashi video makes me instantly happier.

[@bradley6974]

This channel is Awesome!!

[@Folko]

Please never stop making videos with Tadashi

[@myrobotfish]

Don't think I could've understood this without the fantastic animations ... and Tadashi's wonderful sound effects ;)

[@kevalan1042]

this guy is awesome

[@chadisbad6]

I went into this expecting to still not understand by the end, because that is how it usually is with these kinds of videos, but I got it really quick. well done video

[@nicolewestercamp6949]

Ive never been so interested in the cup that holds the coffee, just usually the liquid inside! Thank you!

[@RSDDL]

this guy is amazing!

[@wakethemountain9467]

Awesome video!!!!

[@lucanina8221]

Amazing video

[@ssiltane]

This is so cool! The best introduction ever to inverse spectral problems! Thanks!

[@Fide.sed-qui_vide]

It is a cup of harmony, and sounds great!

[@a.thiren2459]

I can't belive i haven't noticed this before! Thanks!!

[@Coldo3895]

Sir you are awesome !

[@janislogins1438]

i love how he explained what sound is sound in like 5 seconds. great repect

[@jnhrtmn]

Tadashi is awesome.

[@rukiddin0669]

That is awesome. Never thought about this before.

[@shevek5934]

I could listen to his voice all day.

[@duckless8307]

Love this guy

[@Mooncake69420]

So insightful

[@carlacamargo4158]

Ótimo vídeo, como sempre.

[@likeatombomb]

I love the animations of your videos Brady ^-^

[@spcartermtu]

I work in sound and vibrations as an engineer and this is a pretty awesome introduction into vibrio-acoustics and mode shapes. Great job!

[@TheArgusPlexus]

When it finally clicked in my head what he was trying to tell me, I just couldn't help but smile. I love learning new shit.

[@gtjames77]

I literally had this set as a problem in one of my university exams! I remember scratching my head for hours over it, but this explains it so well! :)