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!
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?
@@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.
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.
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. :)
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
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. :-)
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.
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.
It’s a comedy sketch from comedians Robert Webb & David Mitchell about an absurd game show where people just say random numbers & things change around for no reason.
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!
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
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.
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.
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.
@@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
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!!
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.
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.
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...
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!
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!
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
Charged particles in a medium both bind and repel. They tend to accumulate particles of opposite charge along the surface. This opposite charge dominates at a distances and causes the charge to bind. But bellow a certain distance the electric field of the particles starts to overcomes the field of the medium between them. So the particles start to repel each other instead. At this distance the particles find balance. This phenomenon is called "like-likes-like" and it tend to form a sort of crystal structure. You can observe that type of structure in 13:18. If this wasn't the case then you would see the charged particles roll away from one and another much further. Now instead they form a crystalline structure. So I wouldn't compare it what much to a phase change.
@@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
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.
You forgot THE most interesting thing - fast vs slow crystal formation! If you angle the thing veeeeery slightly whilst shaking it you will get much less defects (more crystalline) - wheras if you shake it while flat to spread the balls and then suddenly rotate it it will get more of them (more amorphous). shaking simulates heat and incline simulates binding forces. Also if you shake/vibrate it slightly while maintaining slight angle the defects tend to disappear. This process is actually widely used in metal production to "strengthen" it. And trasclusions! Just throw a bunch of buttons there or something, does not need to be balls. You will see that those tend to start a fault. And different amounts cause different number of faults. And also it is possible to stick plungers to the sides to simulate sheering (/bending) and fault lines kind of changing (dislocation drift). You would see that sheering occurs alongside fault lines, and is harder when there is few of those. Metal fatigue! If you press on a plunger, more defects appear (fatigue) which can culminate into dramatic event of bursting all the balls (metal failure) So many missed opportunities!
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 ;-)
This seems like "I know your side" and "I see your side" arguments where "I am not qualified enough to argue either side". Lovely interaction between you two. I love it!!!
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.
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
Nope, this one was first. The orange cube in the shot is part of the trick. They built this orange cube off-screen and used it in the shot, but when Matt reaches down for it in the other video they pass him a clean board and knives.
I could never tell the difference (apart from layer alignment) between FCC crystal lattices and HCP crystal lattices until I saw this. I love how Steve pointed out that FCC crystals have a symmetry that HCP crystals don’t. I still feel like I’d have to play with it some more, but I feel like I understand it a lot better now.
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.
Steve Mould, Matt Mould here, nice to meet you. Phenominal video! Entertaining and educating simultaneously, kudos. Check out an app in the Play Store (think there may be an iPhone version if you're one of those people,) called FreeBalls. Stumbled on it a couple days before stumbling on this video. I find vacancies, separate 'crystal cells', etc. If your phone's faster than mine (most likely), you can up the 'Physics iterations' in the settings for more realistic reactions. Check it out if you get bored. Subbed, btw, don't see many Moulds out there, least of all interesting ones.
![[Full] 4 ต่อ 4 Celebrity EP.922 | 10 พ.ย. 67 | one31](http://i.ytimg.com/vi/zmV5HRIxIBI/mqdefault.jpg)
Finally a use for all of my extra ball bearings!! Thanks for the class guys.
2,021
@engineer gaming 2,013 feels like yesterday
@@718vox that comment feels like it was sent yesterday
@@Entropy1318 perhaps it is... who knows? :O
@@718vox the ball bearings, they always do :>
Matt's smug smile after "nope, not 1, that's a different number" completely made my day.
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!
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?
@@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.
Even us notso lucky can just look at a street sign pole right? Or is the grain like phenomenon different in galvanized steel?
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.
+AnonEyeMouse we're doomed as a species.
But why the 1k dislikes?
as incoherent as it was, it still made perfect sense.
I was going to like the comment but decided to let it stay at 420 for a little longer
I found crystallization using a particle simulation!
th-cam.com/video/I6bHpJ2GV0Y/w-d-xo.html
if there's a defect in a crystal, is it a parker crystal?
It's a Parker square of a crystal.
Face centric Parker square packing lattice.
I read that as Face centric Parked Square packed lettuce -.-
That "hair". You got me, winking triclops.
That depends. Did it really try?
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
BA DUM TSSSSSSsss
@@khhnator i love you
Like the crackhead who helps you look for it, but has it in his pocket.
But then it becomes an ion... Sorry
Correct
Matt demonstrated the 4 stages of grief quite well when he realized that he couldn't complete the lattice.
I had to go back and check. I loled. X)
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. :)
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
I like how Steve's video says "with Matt Parker," while Matt's video title says "with oranges."
Says it all, doesn't it?
All = 2.
What does it say exactly
Thanks, I hate Matt now
What?
Specifically, "defects with Matt Parker." I think that may say a little of it, too.
"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.
Beakers are for tweakers, I'm living that flasktastic life!
Superior? CONICAL FLASK!!!!
Hahaha, smart move from Matt Parker xD
Matt: "6"
Steve: "That's a good one"
Matt: "No one is a different number"
I kinda wish he would have said, "No, six makes a terrible one."
12 is better. Twice as good I'd dare say!
Matt: 6
Steve: Oh, that's a good 1
Matt: That's a different number
Steve: Wha'ts the difference?
Matt: 5
That's such a parker square of a pun.
Actually, someone might be a different number.
That phase transition demo was mind blowing.
Even though I'm a gardener, I didn't know all this about lettuce.
Lattice! The stuff you grow climbers up.
@@dontalkt2meboutheros ah, but isn't that technically a trellis?
"I stole your electrons, I do apologize" Love it!
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. :-)
Despite never having seen (a) transparent cardboard (box), I admire your logical use of parentheses. ;)
To be fair it has etched glass
@@theshuman100 Plexiglass
I’m more amused by the ‘meaning’ of the video’s title, thanks to the lack of punctuation. Poor Matt! 😆
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.
I noticed 😅
Thing I wanted to see: Annealing (shaking the toy progressively softer) to try to make a perfect crystal.
Have you ever tried that to make a perfect baby?
Suvi-Tuuli Allan my dad tried that and my brain dripped out of my ear
+suvi- tuuli allan loll that's save and I love it
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.
trigonzobob I thought this was public knowledge (hence the analogies of buns and ovens).
Two guys talking excitedly about their balls is exactly what I needed today.
"So occasionally Matt might say some numbers or something like that."
"Six."
"THAT'S NUMBERWANG!"
What
@@trickytreyperfected1482 I'm sorry, that is not Numberwang
It’s a comedy sketch from comedians Robert Webb & David Mitchell about an absurd game show where people just say random numbers & things change around for no reason.
I had no idea Matt Parker had crystal defects, but thanks for proving it using 3,000 ball bearings
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!
Watch the simultaneously.
Put the coffee down
In addition, one video starts at the end of the other one for both videos.
Parker Moebius strip, or Parker recursion
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
I like that video, but why do they keep talking about lettuce ?
Because when charged you can see the transition from gas to salad.
Hilarious!
They are talking about "Lattice" not "Lettuce"
.
.
.
.
.
.
Bring on the Woooshs
It's my *fault.* Trying to make the *Krusty* Krab more trendy.
Because you lost your electrons
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.
100x30 instead of 100x100. Classic Parker Square.
We see the Parker Square at 11:09
+
Parker estimation
Watching that highly efficient hexagonal packing was absolutely riveting, I must say!
such good chemistry between you two, love the banter!
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 love the banter between Steve and Matt.
I want to have a frienemy like this two have each other :)
Their on-screen chemistry is to-die-for!
not me, it was the only part of the video that made me want to turn it off
Matt looks like " do you believe this shit "
The shade is sooooooo real over the beaker.
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.
Matt: You've got these in a beaker, *looks straight at camera* a beaker.
11:50
I'll ask..... Does beaker mean penis?
Hahaha I think the joke is just to distinguish from an Erlenmeyer flask which is what most people think a beaker is.
@@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
Love it when you math & physics channels pair up.
Acrylic will charge negatively, wool positively.
Thank you kind commentator.. I came down here looking for this ;)
But does that mean that the balls will charge negatively as well?
Yes, because Steve added some electrons to the whole system.
M4n10L aaaand Matt took them away.
Matt the electron thief
pretty rare to watch 2 nerds being nerdy about math and phisics and still be entertained and educated. nice1 :)
3:42
Bit of a Parker defect
More like a parker analogy
I think steve was hinting this comment when he said "not quite perfect"
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!!
Totally looking forward to seeing atomix re-creations for sale on mathsgear =D
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.
I'm publishing this then getting on a airplane for 7 hours so no replies from me for a while!
Steve Mould Enjoy your trip!
I once got on an airplane for *3* *hours* before we finally left for Frankfurt.
_Will yours be going somewhere !?!!_
Lest go wild! We have 5 hours until he is back
IT'S *"AEROPLANE"* not "airplane"!!!!!!!
Only 3 hours to go.
1.OMG that phase boundary was awesome!
2. Cubic face packing sounds filthy.
Comment №2 had me in tears!
14:23
"shut up Matt, this is MY channel!"
lol
5:40
Steve: "I don't think they do this in ball pools."
Matt: "I do."
Steve: * tf Matt? *
3000 ball bearings show crystal defects with Matt Parker?
Matt Parker has crystal defects?
Don't we all tho really
With Matt, the balls form defects, without him, they may not.
It's a Parker defect
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.
skip to 11:53 if you are only here for the beaker-action.
You guys have a delightful chemistry together! You could be a world-class science comedy duo!
This was great! I'll probably use it next time I'm teaching 1st year students in general and inorganic chemistry!
I was taught this at university, but this makes way more sense now. Thank you!
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...
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!
Renamed: Matt and Steve play with their balls.
Description: Two men using their balls to demonstrate cubic face packing.
Comment: Renamed: Matt and Steve play with their balls.
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!
I feel as if I'm stuck in a cycle between these two videos...
If you mass produced that Atomix thing, it would make great merchandise for your channel.
3000 ball bearings? But you said it was 10,000. Were most of them in the beaker?
Landon Kryger 3 layers of balls
If you look closely you can see it's just one layer. Landon's right! wtf
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.
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
@@depressedtv I was so angry! I counted them and they weren't what they said! Unsubscribe
Love that you guys made the videos match up no matter the order you watch the two videos.
Steve's video: with Matt Parker
Matt Parkers video: with oranges
🤦🏼♂️
This is a great tool you've created. Thousands of kids will be inspired and informed by this. You guys are awesome.
Crystal ball packing... what REALLY goes on behind closed doors at the fortune tellers.
Now that is a very clever joke! Well done!! 😁
Charged particles in a medium both bind and repel. They tend to accumulate particles of opposite charge along the surface. This opposite charge dominates at a distances and causes the charge to bind. But bellow a certain distance the electric field of the particles starts to overcomes the field of the medium between them. So the particles start to repel each other instead. At this distance the particles find balance.
This phenomenon is called "like-likes-like" and it tend to form a sort of crystal structure. You can observe that type of structure in 13:18. If this wasn't the case then you would see the charged particles roll away from one and another much further. Now instead they form a crystalline structure. So I wouldn't compare it what much to a phase change.
10:26 So the 3D crystal structure could also go like: ABCCBA - middle layers not packing perfectly? Matt seemed to understand it as ABCBA.
ABCBA will still lead to close packing...ABCCBA will not. Such packign is not found in real crystals
@@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
A real stacking fault would be ABCABABC not a reversal of order.
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
9:11 Cubic face-packing is way too funny XD
And the way he says it :'D
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.
please observe the two stages proceeding baldness
Exhibit a) Steve
Exhibit b) Matt
Exhibit c) the balls
This explains crystalline structures and their defects in 14 min so much better than my materials science professor did in a month.
mmm, crystal lettuce
Just found this channel. Really nice stuff. love the atmosphere and your examples
Two grown men playing with their balls...
Excellent video.
You forgot THE most interesting thing - fast vs slow crystal formation!
If you angle the thing veeeeery slightly whilst shaking it you will get much less defects (more crystalline) - wheras if you shake it while flat to spread the balls and then suddenly rotate it it will get more of them (more amorphous). shaking simulates heat and incline simulates binding forces.
Also if you shake/vibrate it slightly while maintaining slight angle the defects tend to disappear. This process is actually widely used in metal production to "strengthen" it.
And trasclusions! Just throw a bunch of buttons there or something, does not need to be balls. You will see that those tend to start a fault. And different amounts cause different number of faults.
And also it is possible to stick plungers to the sides to simulate sheering (/bending) and fault lines kind of changing (dislocation drift). You would see that sheering occurs alongside fault lines, and is harder when there is few of those.
Metal fatigue! If you press on a plunger, more defects appear (fatigue) which can culminate into dramatic event of bursting all the balls (metal failure)
So many missed opportunities!
10:12
That's a classic Parker faze.
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)
I have a solid-state chemistry exam tomorrow and came back to watch this video. Thanks for the help.
That would be a solid-liquid phase boundary.
This seems like "I know your side" and "I see your side" arguments where "I am not qualified enough to argue either side". Lovely interaction between you two. I love it!!!
My graduate research group did work on this, finding good conditions to reduce defects. Really neat to see this pop up!
This is great! I just started working with FCC crystals for work and just learned about the fault lines and machining faces!
Take my money. Ball berring toy very satisfying.
Find yourself someone who looks at you the way Steve looks at Matt 14:18
Three dimensions are too complicated for me. I'm fine down here in Flatland, thank you very much.
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.
so if you always have two choices how to pack the next layer... you can encode binary data in a crystal?
It would be hard to read and possibly even harder to make, though it would be an extremely reliable long-term data storage
Yea
I like watching Matt jump through 2 levels of excitement at 10:54.
IM STUCK IN A RECURSION!!!!! HELP MEEEEE PLEASE!!!!!!!!!!!
But you don't have a condition.
It's okay so long as it's primitive recursive.
I'll help!
Let me quickly solve the Halting Problem, I'll be right back...
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
I came for the ball bearings. I stayed for the quantum physics.
This was a great level 1 look at materials engineering
I love how Matt's face goes "oh no he didn't..." at 11:34 xD
Just watched both videos.. Which came first? they loop way to much xD
Lordious The magic, it's ruined!
Nope, this one was first. The orange cube in the shot is part of the trick. They built this orange cube off-screen and used it in the shot, but when Matt reaches down for it in the other video they pass him a clean board and knives.
And the box lattice is in the other video. That doesn't actually prove anything.
The first layer was made pre video. The lattice in the closed packing video had all 3 layers.
I could never tell the difference (apart from layer alignment) between FCC crystal lattices and HCP crystal lattices until I saw this. I love how Steve pointed out that FCC crystals have a symmetry that HCP crystals don’t. I still feel like I’d have to play with it some more, but I feel like I understand it a lot better now.
12:40 why is the wrong number in the title?
Maybe because it's irrelevant and a PITA to change.
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.
Maybe 7000 are in the beaker.
This taught me more than 2 weeks of solid-state physics lectures.
I guess my professor should play in the ball pool a little more often
I ship these 2
they can't. they believe in different circle constants
A forbidden romance
Go ship yourself
I love when these two team up
4:15 I don't think "click bait" in the middle of a video would be very effective. :-p
Haven't seen two guys this excited about tight ball packing since Folsom Street Fair! Love the energy!
i would join in, but sadly i don't have the balls for it.
Steve Mould, Matt Mould here, nice to meet you. Phenominal video! Entertaining and educating simultaneously, kudos. Check out an app in the Play Store (think there may be an iPhone version if you're one of those people,) called FreeBalls. Stumbled on it a couple days before stumbling on this video. I find vacancies, separate 'crystal cells', etc. If your phone's faster than mine (most likely), you can up the 'Physics iterations' in the settings for more realistic reactions. Check it out if you get bored. Subbed, btw, don't see many Moulds out there, least of all interesting ones.
10:26 Not C twice in a row X)
I like how when you say 'symmetry', Matt's eyes pop and he leans forward, his whole body tense. You just gave him a math hardon.
bonus info: my parents own a few folding tables exactly like the one in the video :D