Matt's smug smile after "nope, not 1, that's a different number" completely made my day.

Matt demonstrated the 4 stages of grief quite well when he realized that he couldn't complete the lattice.

@41-Haiku

6 жыл бұрын

I had to go back and check. I loled. X)

Ah... A perfect display of the human condition. Two intelligent men (and a reasonably intelligent comment section) discussing maths and physical laws and trying to understand the beauty in the order of the universe... Whilst constantly defaulting to telling jokes about their balls.

@SteveMould

7 жыл бұрын

+AnonEyeMouse we're doomed as a species.

@pluransart1795

6 жыл бұрын

But why the 1k dislikes?

@tomcollier4089

5 жыл бұрын

as incoherent as it was, it still made perfect sense.

@alechenson521

4 жыл бұрын

I was going to like the comment but decided to let it stay at 420 for a little longer

@TheRainHarvester

4 жыл бұрын

I found crystallization using a particle simulation! kzread.info/dash/bejne/e2qWqtKDYqq8YLw.html

Finally a use for all of my extra ball bearings!! Thanks for the class guys.

@ranmindyt2902

3 жыл бұрын

2,021

@dadutchboy2

Жыл бұрын

@@ranmindyt2902 that is the most cursed way of writing 2021

@718vox

Жыл бұрын

@@dadutchboy2 2,013 feels like yesterday

@entropy5685

11 ай бұрын

@@718vox that comment feels like it was sent yesterday

@718vox

11 ай бұрын

@@entropy5685 perhaps it is... who knows? :O

if there's a defect in a crystal, is it a parker crystal?

@bytefu

7 жыл бұрын

It's a Parker square of a crystal.

@RosarioLeonardi

7 жыл бұрын

Face centric Parker square packing lattice.

@vanguarded3264

7 жыл бұрын

I read that as Face centric Parked Square packed lettuce -.-

@25cj

7 жыл бұрын

That "hair". You got me, winking triclops.

@therwfer

7 жыл бұрын

That depends. Did it really try?

Hahaha, smart move from Matt Parker xD Matt: "6" Steve: "That's a good one" Matt: "No one is a different number"

@seanehle8323

7 жыл бұрын

I kinda wish he would have said, "No, six makes a terrible one."

@ZioStalin

7 жыл бұрын

12 is better. Twice as good I'd dare say!

@Theraot

7 жыл бұрын

Matt: 6 Steve: Oh, that's a good 1 Matt: That's a different number Steve: Wha'ts the difference? Matt: 5

@kubadzejkob332

7 жыл бұрын

That's such a parker square of a pun.

@riccardoorlando2262

7 жыл бұрын

Actually, someone might be a different number.

2 atoms bump into each other: atom 1: Oh no, I dropped an electron atom 2: are you sure? atom 1: yea, I'm positive

@khhnator

4 жыл бұрын

BA DUM TSSSSSSsss

@jamesramplin8124

4 жыл бұрын

@@khhnator i love you

@garybarbourii8274

4 жыл бұрын

Like the crackhead who helps you look for it, but has it in his pocket.

@mandelbrot91

3 жыл бұрын

But then it becomes an ion... Sorry

@pressaltf4forfreevbucks179

3 жыл бұрын

Correct

"I'll just pour this out...of a beaker." I feel like this is an advertisement for beakers, which are superior to other liquid containers.

@MrMyKidd

3 жыл бұрын

Beakers are for tweakers, I'm living that flasktastic life!

@Varksterable

3 жыл бұрын

Superior? CONICAL FLASK!!!!

I like how Steve's video says "with Matt Parker," while Matt's video title says "with oranges." Says it all, doesn't it?

@BaldAndroid

7 жыл бұрын

All = 2.

@coolmonkey619

5 жыл бұрын

What does it say exactly

@phs125

4 жыл бұрын

Thanks, I hate Matt now

@ivanadriazola1991

4 жыл бұрын

What?

@genegreigh8782

3 жыл бұрын

Specifically, "defects with Matt Parker." I think that may say a little of it, too.

"So occasionally Matt might say some numbers or something like that." "Six." "THAT'S NUMBERWANG!"

@trickytreyperfected1482

3 жыл бұрын

What

@Sn0wjunk1e

2 жыл бұрын

@@trickytreyperfected1482 I'm sorry, that is not Numberwang

That phase transition demo was mind blowing.

"I stole your electrons, I do apologize" Love it!

Even though I'm a gardener, I didn't know all this about lettuce.

@dontalkt2meboutheros

3 жыл бұрын

Lattice! The stuff you grow climbers up.

@trickytreyperfected1482

3 жыл бұрын

@@dontalkt2meboutheros ah, but isn't that technically a trellis?

As a former metallurgy technician who had to inspect forged metal parts ("spider" gears and other various vehicle gears) on a daily basis, I found this very interesting. It certainly matches the sort of structures I would see under a microscope after polishing and etching the metals. Neat!

@Heikki_Finland

7 жыл бұрын

I was told that by rolling or forging steel those crystals become flat ribbon like structure and that is what makes the steel stronger in opposite to cast steel of similar material. Is this true, or is there porosity for some other reason that the rolling eliminates?

@Thematic2177

5 жыл бұрын

@@Heikki_Finland - by rolling or hammering a cold metal you introduce more crystal discontinuities (defects), which make the material harder, but more brittle. It's the same principle as with quenching - by rapidly cooling a metal, you don't give it time to crystallize evenly, so a quenched item has a lot of discontinuties, so it's hard and brittle. You should remember that more hardness is not always better. You want a knife edge to be hard so it stays sharp, but on the other hand - you want structural steel to be flexible so it doesn't shatter in an earthquake.

@abstractapproach634

Жыл бұрын

Even us notso lucky can just look at a street sign pole right? Or is the grain like phenomenon different in galvanized steel?

I came to this video in my first year of dental school, we were learning about dental materials and there was a BCQ in my test paper regarding "defects" and "vacancies" and I realized I needed to work on my concept there. You guys helped me understand the concept in such an easy visual way, it increased my interest in material science. And now, here I am again, just finished with my final year of dental school, rewatching this video with the same enthusiasm as I did the very first time. These science/educational videos and the people involved in their making have played such an important role in my life, and I'm sure many people feel the same way. So thank you! Thank you for redirecting our thought process, increasing our interest, helping us through our studies, and revolutionising the means of seeking of knowledge. :)

@hareecionelson5875

Жыл бұрын

I used to be junior doctor, but the lure of the science and maths trapped me and now I'm a physics undergrad. I love it when biologists lurk in the comment threads, like peering over the fence to spy on the physicists

That defect motion is the definition of plastic deformation. The defect that formed on the line between the two "crystals" is a line defect called a twin boundry. To expound upon the FCC and HCP debate the main difference is the close packing direction which limits the slip directions of HCP, means stiffer and more brittle crystals. Glad to see materials engineering getting some recognition

Thing I wanted to see: Annealing (shaking the toy progressively softer) to try to make a perfect crystal.

@SuviTuuliAllan

7 жыл бұрын

Have you ever tried that to make a perfect baby?

@amneenja5720

7 жыл бұрын

Suvi-Tuuli Allan my dad tried that and my brain dripped out of my ear

@miskone1044

7 жыл бұрын

+suvi- tuuli allan loll that's save and I love it

@trigonzobob

7 жыл бұрын

Suvi-Tuuli Allan - What?!? Sounds like you're talking about a crystal made up of babies. No, to make a perfect baby, you obviously need to heat it up really hot and allow it to cool slowly.

@RolandoGarza

7 жыл бұрын

trigonzobob I thought this was public knowledge (hence the analogies of buns and ovens).

I am amused that you seem to have blown your special effects budget making the super fancy replica of that Atomix toy, and then just used a(n opaque) cardboard box for the 3D example. :-)

@lettersquash

6 жыл бұрын

Despite never having seen (a) transparent cardboard (box), I admire your logical use of parentheses. ;)

@theshuman100

5 жыл бұрын

To be fair it has etched glass

@cursedcliff7562

4 жыл бұрын

@@theshuman100 Plexiglass

@Monkey80llx

2 жыл бұрын

I’m more amused by the ‘meaning’ of the video’s title, thanks to the lack of punctuation. Poor Matt! 😆

You can also get Steve's "stacking defect" (a boundary between face-centered cubic, and hexagonal close packing) if you play around with a batch of magnetized balls. It can happen with or without a polarity difference, and in a single layer or across multiple layers.

I got into your videos from veritasium2, and here i am hooked up with your videos. This is the best explanation of crystal defects. Loved your way of explanation!!

MFW I am stuck in a loop trying to figure out which video to watch first because both videos reference the other at the start making me think I should watch the other video first but then the other video references this video at the start making me think I should watch this one first!

@hellterminator

7 жыл бұрын

Watch the simultaneously.

@bunberrier

6 жыл бұрын

Put the coffee down

@TheinLinAung

5 жыл бұрын

In addition, one video starts at the end of the other one for both videos.

@paulfredrickson3041

5 жыл бұрын

Parker Moebius strip, or Parker recursion

100x30 instead of 100x100. Classic Parker Square.

@d5uncr

7 жыл бұрын

We see the Parker Square at 11:09

@ZeroKage69

6 жыл бұрын

+

@andrerenault

5 жыл бұрын

Parker estimation

Love it when you math & physics channels pair up.

Watching that highly efficient hexagonal packing was absolutely riveting, I must say!

Matt: You've got these in a beaker, *looks straight at camera* a beaker. 11:50

@hamnchee

6 жыл бұрын

I'll ask..... Does beaker mean penis?

@andrewjohnson6716

4 жыл бұрын

Hahaha I think the joke is just to distinguish from an Erlenmeyer flask which is what most people think a beaker is.

@coryman125

4 жыл бұрын

@@andrewjohnson6716 It's a bit of a Steve Mould running gag. He discovered if you pour a certain type of chain out of a beaker, it rises up into the air before falling (google Mould Effect to see it). Since then it's become a recurring thing that he pours every unusual substance he uses out of a beaker. Just as Matt does here with the ball bearings :P

3:42 Bit of a Parker defect

@tatomar001

7 жыл бұрын

More like a parker analogy

@tinyturtle1898

6 жыл бұрын

I think steve was hinting this comment when he said "not quite perfect"

Ive got my 3rd year uni surface physics module exam on monday and so much of this is relevant, and was a timely visualisation of the concepts, wonderful, thank you!

Love that you guys made the videos match up no matter the order you watch the two videos.

I love the banter between Steve and Matt.

@pabloagsutinnavavieyra2308

7 жыл бұрын

I want to have a frienemy like this two have each other :)

@myne4

6 жыл бұрын

Their on-screen chemistry is to-die-for!

@ZimZam131

6 жыл бұрын

not me, it was the only part of the video that made me want to turn it off

@geejee1255

6 жыл бұрын

Matt looks like " do you believe this shit "

@nopy.4869

5 жыл бұрын

The shade is sooooooo real over the beaker.

I like that video, but why do they keep talking about lettuce ?

@hamnchee

6 жыл бұрын

Because when charged you can see the transition from gas to salad.

@redbrick341

6 жыл бұрын

Hilarious!

@ypn.official

5 жыл бұрын

They are talking about "Lattice" not "Lettuce" . . . . . . Bring on the Woooshs

@LUchesi

5 жыл бұрын

It's my *fault.* Trying to make the *Krusty* Krab more trendy.

@sriruparoy4946

3 жыл бұрын

Because you lost your electrons

Just found this channel. Really nice stuff. love the atmosphere and your examples

This is great! I just started working with FCC crystals for work and just learned about the fault lines and machining faces!

Acrylic will charge negatively, wool positively.

@Twitchi

7 жыл бұрын

Thank you kind commentator.. I came down here looking for this ;)

@Hetst

7 жыл бұрын

But does that mean that the balls will charge negatively as well?

@M4n10L

7 жыл бұрын

Yes, because Steve added some electrons to the whole system.

@raymondlee1024

7 жыл бұрын

M4n10L aaaand Matt took them away.

@potatoonastick2239

7 жыл бұрын

Matt the electron thief

such good chemistry between you two, love the banter!

5:40 Steve: "I don't think they do this in ball pools." Matt: "I do." Steve: * tf Matt? *

This is great hands-on demonstration and explanation! The other demonstration I would have LOVED to have seen is this: Annealing! Vibrate the entire apparatus slightly - not enough to disrupt the grains but enough to cause some slight motion - and watch the crystal boundaries move and the grains themselves grow.

14:23 "shut up Matt, this is MY channel!" lol

Totally looking forward to seeing atomix re-creations for sale on mathsgear =D

1.OMG that phase boundary was awesome! 2. Cubic face packing sounds filthy.

@richiehoyt8487

3 жыл бұрын

Comment №2 had me in tears!

I just want to say that your channel is arguably the best channel on Physics, You have a god gifted amazing deep voice that catches my attention and doesn't let it go, and the way you explain is also amazing. Plus your videos are not half-hour videos, one can learn something in only 15 mins or so!

3000 ball bearings show crystal defects with Matt Parker? Matt Parker has crystal defects?

@zachburke8906

7 жыл бұрын

Don't we all tho really

@Anvilshock

7 жыл бұрын

With Matt, the balls form defects, without him, they may not.

@eunosmx582

7 жыл бұрын

It's a Parker defect

This was great! I'll probably use it next time I'm teaching 1st year students in general and inorganic chemistry!

Really great videos. Nice editing, love how you can watch either video first and it works :)

Someone should make a video of just Matt Parker's reaction faces. He has the most entertaining facial expressions on the interwebs, and his face is especially entertaining while Steve Mould is talking.

Materials Science: Thanks for the clearest demonstration of the simple case of our most basic principal. Plus, any video that uses the term, stacking fault, correctly automatically gets a like.

I was taught this at university, but this makes way more sense now. Thank you!

Very neat packing experiment. Effectively explained. The vertical crystal structure created by the 3 lattice choices really help me visualize how DNA structure may have come to be organized.

I had no idea Matt Parker had crystal defects, but thanks for proving it using 3,000 ball bearings

Hey Steve and Matt! I'm studying both materials science and math in uni, so I was super excited to see this pair of videos! I thought it was kind of funny that I've actually stacked balls in a box just like you guys, but for a class (and therefore a grade). And of course done the working out for atomic packing factor *multiple* times for homework in different classes ;) Anyway, I thought I'd give a suggestion that's kind of relevant to both videos. When I first learned that ABC stacking really is FCC, for me at least, I had trouble seeing where the cubic unit cell was. In Matt's video, I feel he could've been more clear during that part, because what he said seemed (to me) to suggest that the square pyramid base was a face of the cube, but it's not. You outline the square base at 11:10 in this video, and I feel like that would've also been a perfect opportunity to highlight exactly where the FCC unit cell is, and show how it's exactly the unit cell you and Matt construct with oranges, just oriented differently. So I've gone ahead and made this: imgur.com/a/k4oog to hopefully help other people see it too, in case they were confused by that point. Keep up the awesome videos, you guys are hilarious!

Renamed: Matt and Steve play with their balls.

@nagualdesign

7 жыл бұрын

Description: Two men using their balls to demonstrate cubic face packing.

@bradirv

6 жыл бұрын

Comment: Renamed: Matt and Steve play with their balls.

Two guys talking excitedly about their balls is exactly what I needed today.

I love when these two team up

mmm, crystal lettuce

skip to 11:53 if you are only here for the beaker-action.

Very nice video. Would have been great to see this last year when I studied materials chemistry. I love the ball bearing packing toy. I will have to try to make one. Especially the gas phase ball bearings, it seems to show adsorption of gases onto the surface. It even highlights the different types of physisorption. Either that or an analogy of preorganised water a crystal surface.

This is a great tool you've created. Thousands of kids will be inspired and informed by this. You guys are awesome.

I'm publishing this then getting on a airplane for 7 hours so no replies from me for a while!

@Blueice999

7 жыл бұрын

Steve Mould Enjoy your trip!

@gizmogoose.2486

7 жыл бұрын

I once got on an airplane for *3* *hours* before we finally left for Frankfurt. _Will yours be going somewhere !?!!_

@mauritz3912

7 жыл бұрын

Lest go wild! We have 5 hours until he is back

@miscellaneous.7127

7 жыл бұрын

IT'S *"AEROPLANE"* not "airplane"!!!!!!!

@dg-hughes

7 жыл бұрын

Only 3 hours to go.

3000 ball bearings? But you said it was 10,000. Were most of them in the beaker?

@malnutritionboy

7 жыл бұрын

Landon Kryger 3 layers of balls

@cosmicmatrix6238

7 жыл бұрын

If you look closely you can see it's just one layer. Landon's right! wtf

@tylergarza6632

6 жыл бұрын

i'm not sure what you're question even is. his guess was 3000, but the actual amount was 10k. nobody said there were only 3000.

@depressedtv

6 жыл бұрын

Landon is referring to the title of the video; it says 3000. It's clearly click bait. People came here expecting 3000 ball bearings, and it's actually 10,000

@thebrahmnicboy

4 жыл бұрын

@@depressedtv I was so angry! I counted them and they weren't what they said! Unsubscribe

You guys have a delightful chemistry together! You could be a world-class science comedy duo!

Great stuff! I saw some footage of jet turbine blades being grown as a single crystal because it won't expand when heated. Would love to see visualisation of that process explained to a simpleton like me.

Steve's video: with Matt Parker Matt Parkers video: with oranges 🤦🏼‍♂️

I feel as if I'm stuck in a cycle between these two videos...

I like how Matt was doing a proper sign off as he would on his channel and Steve was just letting the video end like he always does

I'm a bit disappointed that no one seems to have noticed that Matt's video conclusion was Steve's video's intro and this video's conclusion was Matt's intro. Making both videos a perfect loop where I was having fun trying to guess what was filmed first.

10:12 That's a classic Parker faze.

This is similar to how in the game of Catan/ Settlers of Catan, settlements must have at least one adjacent intersection of 3 hexagons, and so if the players build them 3 sides apart, there are fewer positions to build settlements than if players played optimally to place as many as possible. In the same way, Steve and Matt both placed their balls on the 3rd layer as efficiently as possible until they met each other's regions. Perhaps the game designers of Catan were thinking of crystal defects when they created the rules for the distance between settlements...

Great vid! I'm going to share this with my material sciences class!

It is a perfect analogy for the crystalline structure of metals such as iron. I have been working with that for years, and as a blacksmith I can say it is fundemental to the production process

Wait. 3000 or 10000?

@bartschellings5272

7 жыл бұрын

Alison Sanches Krinski yes, the truth can't be untold!

so if you always have two choices how to pack the next layer... you can encode binary data in a crystal?

@AdityakrishnaMr

4 жыл бұрын

It would be hard to read and possibly even harder to make, though it would be an extremely reliable long-term data storage

@therobot1080

3 жыл бұрын

Yea

Never seen or heard of you guys but I like it. Will watch a bit more.

awesome practical demo!

9:11 Cubic face-packing is way too funny XD And the way he says it :'D

My graduate research group did work on this, finding good conditions to reduce defects. Really neat to see this pop up!

Love the invocation of graph theory to explain the lattice configuration options!

This video is densely packed with cool information. Thanks a lot!

10:26 So the 3D crystal structure could also go like: ABCCBA - middle layers not packing perfectly? Matt seemed to understand it as ABCBA.

@SKarthikeyan75

6 жыл бұрын

ABCBA will still lead to close packing...ABCCBA will not. Such packign is not found in real crystals

@sparkzbarca

4 жыл бұрын

@@SKarthikeyan75 yes it is, that's his point. If your curious why it's found its the same reason the ab vs abc defect is found. Lattices begin forming at multiple points at once and they bump

@steelwarrior105

4 жыл бұрын

A real stacking fault would be ABCABABC not a reversal of order.

please observe the two stages proceeding baldness Exhibit a) Steve Exhibit b) Matt

@k20nutz

3 жыл бұрын

Exhibit c) the balls

I have a solid-state chemistry exam tomorrow and came back to watch this video. Thanks for the help.

I watched this video last year and thought it was kind of cool. I just am finishing my Properties of Engineering Materials course now (final is tomorrow), and this is much more relevant now! Cool to see that transition.

Crystal ball packing... what REALLY goes on behind closed doors at the fortune tellers.

@j.vonhogen9650

3 жыл бұрын

Now that is a very clever joke! Well done!! 😁

I ship these 2

@christiandevey3898

7 жыл бұрын

they can't. they believe in different circle constants

@828burke

7 жыл бұрын

A forbidden romance

@custersword7746

7 жыл бұрын

Go ship yourself

Fascinating! Didn't expect to find such an analogy IRL

By far the most explanatory video I’ve ever watch. 🤙🏼🤙🏼

Two grown men playing with their balls... Excellent video.

Take my money. Ball berring toy very satisfying.

Omg this video was so so so good. So casual and informative. And i understood EVERYTHING.

Thank you so much, this has helped me visualise the structures and defects for my materials exam this week 😂 (mechanical engineering)

IM STUCK IN A RECURSION!!!!! HELP MEEEEE PLEASE!!!!!!!!!!!

@bytefu

7 жыл бұрын

But you don't have a condition.

@ABunchOfRandomAnons

7 жыл бұрын

It's okay so long as it's primitive recursive.

@frechjo

7 жыл бұрын

I'll help! Let me quickly solve the Halting Problem, I'll be right back...

That would be a solid-liquid phase boundary.

Great chemistry between you two

Thanks for a crystal-clear (sic) explanation! And yes, I'm fully aware that "crystal glass" actually is amorphous. Will use your video to help my students get to the same level ;-)

That is the tastiest fcc lattice model ever! 2:47 (And it is proof that this was filmed second :D)

Three dimensions are too complicated for me. I'm fine down here in Flatland, thank you very much.

This explains crystalline structures and their defects in 14 min so much better than my materials science professor did in a month.

you are so amusing to watch. great job

12:40 why is the wrong number in the title?

@lettersquash

6 жыл бұрын

Maybe because it's irrelevant and a PITA to change.

@41-Haiku

6 жыл бұрын

When he asked for an estimate, I looked at the title and felt smug that I already knew and could enjoy the dramatic irony. Turns out the joke was on us.

@quacking.duck.3243

6 жыл бұрын

Maybe 7000 are in the beaker.

I came for the ball bearings. I stayed for the quantum physics.

@steelwarrior105

4 жыл бұрын

This was a great level 1 look at materials engineering

Thank you for posting this. The visual representations helped me tremendously more than text book drawings to understand. I have been studying visual grain inspection and x-ray diffraction to measure crystal orientation to expand my abilities at the foundry I am currently employed with. In addition to the NDT methods I am currently certified in, I feel having grain inspection certifications will be more beneficial to the company and myself. The more I know, the less likely I will need to worry if a layoff is required. Again thanks, this will certainly help me with understanding and allow me to pass the tests.

Steve mould is gold!!