The Secret of Floppy Paper - Numberphile

Tadashi is back, this time looking at drooping paper (and toilet paper).
More links & stuff in full description below ↓↓↓
Subscribe to Numberphile and never miss a floppy paper video: bit.ly/Numberphile_Sub
Playlist of Tadashi Tokieda videos: bit.ly/tadashi_vids
Pizza and Gaussian curvature: • The Remarkable Way We ...
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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

[@twalton]

Tadashi is one of my favorite stars of this channel. "I don't know if it's the first time that toilet paper makes an appearance in numberphile..." XD

[@SeleniumGlow]

Agreed. This man has an amazing sense of humor.

[@garbage63]

That toilette paper was terrible.

[@francomiranda706]

+BocoCorwin Rob is being terrible, while the toilet paper is being tearable

[@timothyrades9831]

Number2phile

[@Blackmark52]

I'm very familiar with paper grain, but the insight into their role in toilet paper was absorbing.

[@ObiWanCannoli]

Toilet puns

[@jonahlee8894]

HAHAHAHAHAHAHAAA

[@chucksherron]

👍

[@anantdixit3831]

You win the internet!

[@rparl]

(Pun acknowledged) A recent trend in commercial TP is the use of unperforated paper. This shows why it doesn't work well. (End rant)

[@SithBowman]

For more info on Gaussian Curvature, find the video numberphile made called "The Remarkable Way We Eat Pizza"

[@numberphile]

yes, it is also linked in the video description of this video. or it is right here: kzbin.info/www/bejne/nZqQhXWinZlnnbs

[@dlee645]

I was thinking the exact same thing.

[@arturmizuno]

KLEIN BOTTLES

[@42scientist]

+Artur Mizuno there is no link but klein bottles are cool

[@ImmaterialDigression]

This man needs to start a mathematical toy shop

[@letoiiatreides2466]

I'd buy his toilet paper.

+

[@QMPhilosophe]

But I'd get it new...even tough used is probably cheaper.

[@slendy9600]

he needs to partner up with Tim from Grand Illusions

[@direc85]

Perhaps he could team up with James Grime ;)

[@Amphibiot]

This guy has the magical gift of making any boring subject incredibly interesting. He is absolutely fantastic.

[@chucksherron]

Tadashi said he's becoming SmarterEveryDay.

[@The0x539]

And he introduced some Objectivity into things.

[@Gremlins422]

Its nice to see some PeriodicVideos of Tadashi on Numberphile.

×

[@Gremlins422]

Jan Cillié Louw Now the question is: What is x?

[@itskelvinn]

Destin is borderline a douche. Hes so rude and always interrupts his guests to make his lame jokes. I feel like he tries too hard to make himself seem like a science expert rather than teaching his audience.

[@JRCSalter]

As an amateur bookbinder, I am fairly chuffed with myself for knowing the solution before he said it.

[@andrewwong200]

Vocab word of the day.

[@tiuk23]

Im a simple man, no matter what is video about, I see Tadashi, I upvote.

[@AlRoderick]

There should be a link to the gaussian curvature video with the pizza slices that you did with the Klein bottle guy. That was the big math thing in this one and he breezed past it pretty quick.

[@numberphile]

Here you go: kzbin.info/www/bejne/nZqQhXWinZlnnbs

[@BhupinderSinghSaini1]

+

[@Sam_on_YouTube]

Having seen that video, I figured out what was happening as soon as he started moving the binder clip.

[@pavphone2616]

"Klein bottle guy" sounds like a fun superhero name

[@Sam_on_YouTube]

+Pav Phone You could get some great supper powers out of that. Able to walk through walls using the 4th dimension. Lock him in a box and he'll always be outside of it.

[@Cadrid]

I will never get tired of Tadashi videos. Does he have a superpower to make math interesting? I mean, he just talked about paper rigidity--including toilet paper--and I was riveted. That's not natural!

[@nathanielsharabi]

thank you for giving me the wisdom of the structre of toilet paper🙏

[@vasilivanich3842]

Our body has a certain anisotropicity to itself as well. One can easily find it out when trying to use toilet paper in perpendicular fashion to the usual way.

[@gimpdoctor8362]

yes it's also very easy to tear someone in half vertically but much more difficult to tear someone in half horizontally. You can try it at home.

[@MIbra96]

+Ben Nutley I tried it with myself but it hurts a little.

[@Borednesss]

Muscles and bones are anisotropic, I guess

[@dave5194]

Never thought I'd learn something about the engineering of toilet paper on numberphile, that was pretty cool

[@chrisbell8207]

I want him to read me bedtime stories

[@ricardo.mazeto]

I love when people explain mathematical concepts with easy real life examples.

[@TheFreezeChill]

Nope, thats physics.

[@ricardo.mazeto]

TheFreezeChill Physics is a branch of math.

[@theangrymathematician9121]

+Ricardo Mazeto Or rather should be. If you ever took advanced physics it is mostly statistical simulations used rather than analyitical methods.

[@theangrymathematician9121]

+The Angry Mathematician Then again statistics is also a branch of math. Huh. I am drunk.

[@L3ON360Z]

that's one of the best things about Tadashi. He always does this :)

[@samhaberman]

Absolutely incredible. One of the best Numberphile videos for sure.

[@numberphile]

that's kind - cheers for watching

[@superj1e2z6]

It's your boy Tadashi TOYkieda!!!!

[@gg2023]

I would freaking love to have Tadashi as a math teacher. It's like these weird brain goosebumps I get every time I watch something of his.

[@brianpso]

"Everyday I get a little smarter" This is my way of life and I feel proud to know that it is yours too, master.

[@villanelo1987]

About the video description... I think it was perfectly fine to put this video (or others from Tadashi) in this chanel. It is true that they show concepts in a different way then others, but in the end, he is talking about mathematical concepts most of the time (gaussian curvatures in this case), the difference is just that he has applied examples of said mathematical concepts instead of the usual theorical explanations. I mean, I know this is just the opinion from some random guy on the Internet, but reading that description made me think that maybe some people is complaining when Tadashi appears, so I just wanted to offer a different opinion. I love his videos, and I think they fit perfectly in here.

[@batfan1939]

I love the applied stuff. It really compliments the theory videos!

[@StraightOuttaJarhois]

I'm not too concerned with whether Tadashi's videos go up here or on Sixty Symbols (I subscribe to both anyway) as long as they keep coming. They're absolutely delightful.

[@CristiNeagu]

Learning solutions to problems we never knew we had. Engineering...

[@42scientist]

Exactly...

[@amyloriley]

Well, it was a problem once in history. Then they solved it. Now they pass on the knowledge to you, should you want to make your own brand of toilet paper.

[@urble]

man i love maths and science

[@maldoran9150]

What a great teacher!

[@verdatum]

Speaking as a woodworker, and massive fan of composite materials, "anisotropic" is like the best term I've learned in MONTHS!!!!!!!!!!!!!!!!!!!!!!!!!

[@JeoshuaCollins]

**Bows deeply** Thank you, Tadashi. That was wonderful. I would love to see more videos from you and your toys.

[@pinkdispatcher]

The straight vs. across tearing works very well with newspapers, which use very anisotropic paper. And it makes for a nice party trick, asking people to tear it in a straight line, and after demonstrating how good you are at it, you hand it to them, but rotated 90 degrees.

[@invaderpopz]

I love tadashi and I loved the connection to the Gaussian curvature! I only understood that part because I had previously watched the pizza video :) now I feel smarter

[@Anolaana]

Hooray, I'm not the only one who remembers Cliff's video about Gaussian pizza curves!

[@onesagotoomany]

As a bookbinder, I was watching ready to make a comment about how we do know and need to know about paper grain. Then he mentioned bookbinding :D Teaching bookbinding students about grain is normally done with tearing or folding (folding against the grain gives a less smooth fold), but this is a cool new demo.

[@zahbaz]

1.) As a researcher who deals with anisotropic materials, I found this to be a very beautiful demonstration. Thank you for sharing. 2.) This Numberphile video was dangerously close to discussing a different sort of "brown paper."

[@danielgrala7538]

"would Mr.tadashi please return the toilet paper to the bathroom for its intended purpose."

[@darkmage07070777]

2:00 - "And we shall call him...Mini-Todashi."

[@DrRiq]

I watch this guy before I go to parties so I can do cool party tricks jk i have no friends 😢

[@Ambidextroid]

I love his accent, it's somewhat like "engrish" but at the same time incredibly clear and he pronounces words really nicely. I can hardly say "rigidity" without it sounding like a total mouthful.

[@briandeschene8424]

Ambidextroid He has lived and studied in Japan, France, and U.K. so I believe his accent and vocabulary is a wonderful blend of those very different ingredients. I hear aspects of all three languages when he says certain words and phrases.

[@nassar8]

i love the videos you do with Tadashi. effortlessly entertaining and often intellectually challenging at the same time, a winning combo!

[@SocksWithSandals]

I just understood anisotrppy and Gaussian curvature but watching a bloke play with bog roll for five minutes. Great teacher

[@naikshibabrat]

I agree with the above response. A scientist once said "Mathematics is the language of physics", or in this case mechanics of solids or deformable bodies. In applied mechanics and mathematics, these problems are studied using PDEs and experiments. When mathematics is done for the sake of it, as in pure/abstract, we always find some new applications/physical problems that use those tools. For example, Hardy's work on number theory that is used in cryptography.

[@SquirrelASMR]

Wow awesome! I wasn't expecting that, I was expecting a trick like him sliding the paper slightly. Awesome

[@NoriusNr1]

Never gonna look the same way at toilet paper again xD hahah

[@TheGreatRepertoire]

Very interesting. Thank you for your great videos.

[@RodeyMcG]

The Tadashi videos are such standout highlights in this channel. Just excellent

[@SaveSoilSaveSoil]

I have been interacting with paper for decades but never noticed these hidden secrets! Love Tadashi!

[@jbrowsingj]

Truly amazing. I could listen to this man explain anything for hours. Such a talented teacher!

[@charlesfudge2]

Awesome, more Tadashi. Keep the videos coming!

[@ExhaustedElox]

Tadashi-sensei breaks down why mundane things work the way they do so cleverly and clearly. He is a great educator.

[@paulbentley2709]

Brilliant. What a demonstrator.

[@platinummyrr]

this man is an excellent teacher! He really makes things feel exciting and ensures that the listener wants to go learn more on their own!

[@manrajdhanda]

Absolutely wonderful video! One of my favourites

[@theatheistpaladin]

I love Tadashi. Turn math concepts into practical yet rarely known factoids.

[@bwatspro]

Toilet paper from Mathematical Sciences Research Institute. The feeling when toilet paper has better credentials than you.

[@TimJohnson69]

excellent explanation and demonstration

[@Liana8310]

I love the animation when Tadashi is the one lecturing

[@ricodelta1]

I watch Tadashi's videos primarily to listen to his voice. It's quite soothing

[@GoldenBoyz2000]

I have now watched every tadashi video.. I need more!

[@drummer265]

I love every video with him.

[@AnandKrishAK]

A brilliant demonstration!!!

[@Aleph_Null_Audio]

I always get excited when a new video with Tadashi comes out.

[@neropatti1504]

Tadashi and James Grime rock my world. More, plz!

[@mcsoloo]

tadashi rules! more videos plz!!

[@HerrLavett]

Relaxing video. It is now clear that I will watch and listen to anything Tadashi says about anything, anytime.

[@Mephistahpheles]

Love that this guy does so much with stuff simply "around". In grade school, I recall the difficulty in science classes when told to "come up with your own experiment". MANY students had no idea WHAT, nor HOW. (Sadly, I didn't have a teacher that inspired. It was nearly all memorization.)

[@learnchinese8798]

Very interesting video. Thank you so much!

[@gogyoo]

The ideogram for "tree" mutating into the picture of an actual tree was a nice touch!

[@oogalook]

The most comforting voice I've ever heard. Like a mattress of butter.

[@florianju5638]

So cool to watch Tadashis Videos :) Really basic stuff with a strong relation to everyday life. That makes it so interesting for me. More please!

[@Chowder0o]

This is the only man who can make me watch a seven minute video about paper.

[@ihrbekommtmeinenrichtigennamen]

Sir? Why is there a red rectangle at 3:04 for a frame?

[@thepedrorriva]

You really love red rectangules, don't you?

[@sitearm]

nice! also explains why it's hard to tear out articles from the newspaper - up and down tears easily by hand but horizontally have to crease hard or use scissors : )

[@40GallonTophat]

This dude always has the best videos. He finds the most fascinating properties about everything!

[@JohnDCrafton]

I clicked "like" before even watching the video.

[@numberphile]

thank you, I think?

[@JohnDCrafton]

Numberphile No, thank Tadashi!

[@sigurjonmyrdal3873]

Tadashi - absolutely brilliant and entertaining.

[@TheShnitzel]

Tadashi is so fun to watch! He explains very cool things in a really understandable way!

[@closair]

Tadashi has a very interesting way of thinking, and I learn cool stuff from these videos!

[@SecretofTerra]

Really enjoyed it, especially the bit with calligraphy!

[@coolmdj111]

Thank goodness this isn't a *SciShow* video... Trolls there would have a field day with this topic! :P

[@ObiWanCannoli]

Look no further than the comment section.

[@ze_rubenator]

Oh, God...

[@dlee645]

I know what you mean. The comments there have become annoying.

[@imaderobotsoccerteam]

Wait... Why is there tissue paper around .....Ok lets stop here.

[@WMTeWu]

This is simply amazing!

[@tomasalvim1022]

Really cool video! loved it

[@suncu91]

so if a toilet paper tears while i wipe, i should turn it by 90 degrees angle. genius.

[@888SpinR]

Yes! More Tadashi!

[@AxeManAnthony]

Only Numberphile can manage make an educational video about toilet paper construction this damn interesting.

[@KaelinatorPVP]

I was crapping while watching this and I actually tried that toilet paper experiment on my own xD

[@Roescoe]

Yeah I forget the reason I too also tried it, years ago, but I did find that out.

[@kodymongold]

Great vid! I love your vids! 👍🏼

[@JustinKoenigSilica]

well done and well animated! Neat trick.

[@BillM1960]

He never ceases to amaze me.

[@dusandusan4611]

Tadashi kills it every time!

[@nburakovsky]

Tadashi is absolutely killing it

[@MindCraft4You]

This guy has the best videos. Keep up the good work guys :)

[@vivalibertasergovivitelibe4111]

I couldn't imagine paper being that interesting ;D

[@SiMyt848]

This man amaze me all the times!

[@davidmyers5224]

tadashi is awesome. I love videos with him

[@jaidenboucher0]

this is such a fascinating video wow

[@nymalous3428]

I love mathematics, of all kinds, but Tadashi seems to apply mathematical principles to what most people would consider to be non-mathematical circumstances. And he does it in such a way as to be fascinating! He is just wonderful to listen to! (And he is actually the first person I ever saw who did math with his fingers and toes...) Thanks for sharing this!

[@alexanderschestag3247]

Tadashi is great. Even I understand everything he explain.

[@Liana8310]

I can tell weird paper when I do watercolors. The pigment bleeds through the texture/ small ridges. Also happens when you use mechanical pens

[@Mathhead2000]

Awesome video!

[@BeesAndSunshine]

Yes! Even more Tadashi!

[@sugarcane_is_rad]

Tadashi, you are awesome!

[@chillsahoy2640]

So you're getting...Smarter Every Day? Anyway, I'd never thought this much about paper before but it really is quite a fascinating material once you look into its properties. We take it for granted that it works the way we want it to.

[@andriypredmyrskyy7791]

I do shodou too! Tadashi just keeps getting cooler.

[@triplebog]

I love tadashi's voice so much.

[@mikjnomis]

Tadashi's videos are the most interesting to watch

[@TheTombot]

Tadashi, you impress me all the time!