The Periodic Table - 2016-12-09 (page 1 of 2)

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12:42 AM

@Jan Unlike you, Loong is identifiable with information on his profile...

@orthocresol well, I found Jan using just his profile, without using mod powers

I tried several times, but couldn't. :(

Idk what I'm doing wrong.

You know, some people link to their own sites. Other people just drop names and expect you to find the names. But having dived a little deeper into what is written in Loong’s profile and the links therein, I am starting to believe that he has an unfair advantage xD

(Also, @Loong, a link has changed and the way it is written in your data leads to 404.)

:34002602 Grrrrr... that's the rest of today gone, then.

boots up super hacker network

=DDD

12:56 AM

Actually, I'm identifiable now...

Come on, it’s early-ish, isn’t it?

It is, it's 8:30am.

So I have lots of time. ;D

You mean, because you added a location to your profile? xD

Nah.. website.

Tributyl stannane? =O

12:58 AM

If you find my Facebook profile picture, note that it's from 2010...

I’ma not on Facebook …

Thank goodness

Nice food =3

But why did you label food (albeit raw) as ‘not food’? =O

Some of it was nice. Haha

I like birds. So I don't eat them ;)

Hm, Googling my PI, I found his old website from the university of Berlin =D They apparantly never took it down (but it’s probably orphaned).

1:06 AM

Nov 19 at 16:33, by Loong

Ugh, I wrote a lecture script on reactor chemistry maybe more than ten years ago, and now I just wanted to see if it is still available on the internet. And then I found a Greenpeace study that is quoting from my script. :-(

@Loong Links to the wrong post ;p

1:34 AM

Oh well, I guess I wasn't looking hard enough ;D

user228700

Yello everyone :-)

So you found me?

Good seal =)

user228700

I've a quick question about Henry's law. Under the limitations of this law, my textbook writes "The gas shouldn't undergo dissolution in the solvent". Does this mean that I can't tack on the Van 't Hoff factor at the R.H.S of the formula and be on my way..?

@Jan I think I did.

user228700

What I mean is, in case of the Raoult's law, which states that $P_A=P^{\circ}_A \chi_A$ (For a component $A$ in the solution), if this component undergoes dissolution, I can simply multiply the RH.S of the above equation with the Van 't Hoff factor, $i$ and I'd get the correct answer.

1:41 AM

It took you about as long as it took me to write an email asking for counselling ^^'

user228700

Does this not apply in the case of Henry's law?

4:18 AM

@Jan Google+? 3;D

@Kaumudi "... shouldn't undergo dissolution in the solvent ..." Where in T.N did you pick up that idea? O_o

Perhaps you meant "The gas shouldn't chemically combine with the solvent"?

user228700

Nope, that's not what I meant.

user228700

My textbook explicitly states that it shouldn't undergo dissolution. I know, it doesn't make any sense.

@Kaumudi Pinnae?

@Kaumudi Don't tell me that's the NCERT O_o

user228700

Lord, no, it's not NCERT.

user228700

Oh, crap, I misread dissociation as dissolution and that's what I kept using above :-/ God bless my eyes.

user228700

4:34 AM

In any case, my original question was why I can't tack on the Van't Hoff factor at the R.H.S of the formula and be on my way. After all, Henry's Law is a variation of the more general Raoult's law.

@Kaumudi You've got a thalla haven't you? If you come across (seriously) questionable content such as that, you first course of action would be to... ignore it :3

@Kaumudi @$$#*%!

-_-

@ortho o/

:D

user228700

@paracresol A thalla? O.o Oh, u mean thala.

Yeah, the thing that supposedly sits on your shoulders ;P

No dissociation? Then certainly no van't Hoff factor ._.

user228700

-___- My textbook is very well known for screwing up by not explaining anything but it has never given me the incorrect idea about a concept. So I tend to trust it.

@Kaumudi All Indian textbooks are like that >.<

user228700

4:40 AM

No, until 10th class, NCERT is excellent. Anyway, yeah, I don't understand why no dissociation.

Upto 10th? pfff EVERY darned NCERT book is mediocre! MEDIOCRE you hear me! -_-

user228700

Have u studied in K.V at any point? No other schools are allowed to use the N.C.E.R.T up till 10th, so I doubt if u're really talking about the N.C.E.R.T books.

@Kaumudi What's the issue with dissociation now? Do you hear about dinitrogen "dissociating" in water? O_o

@Kaumudi No...not K.V. But I have seen the NCERT's 9th and 10th grade ones...horrible stuff >.<

user228700

@paracresol :-P No, definitely not. Alright, I'll come back and tell if I actually find s'thing.

shrugs

o/

4:46 AM

(∿°○°)∿@⋊ɐnɯnpᴉ

user228700

I don't remember our 9th/10th books but the books for primary children are excellent.

user228700

Anyhoo.

...

@Chemobot just flipped you ;)

user228700

@paracresol -___- Dyou study math? And dyou need to prepare physics just as much as an IIT aspirant must? If so, some of us have created a room.

user228700

$Mathematics$ The JEE LaunchPad

We love Physics, Chemistry and Mathematics. And we are prepari...

4:57 AM

@Kaumudi Do you work part-time in the advertising industry? O_o

Anyways, I'm already taken :3

2 days ago, by Jan

@paracresol I love you, too, deary.

user228700

O.o

user228700

@paracresol -____- I was only being nice.

The JEE launchpad, huh?

user228700

Yep.

@Kaumudi But that sounds like it was rehearsed ;)

Unlike @Jan's feelings, which flow true and strong :3

user228700

5:01 AM

Sigh. It seems that u have an inherent zeal for going against absolutely everything I say.

@Kaumudi With all due respect, a quick glance at the stuff there....and I know that place is messed up XD

user228700

Define "messed up".

@Kaumudi I wasn't programmed to contradict you...don't get too full of yourself ;D

user228700

^ This is exactly what I was talking about.

@Kaumudi "Messed up" as a place where everybody-asks-questions-and-expects-answers-to-fall-out-from-the-sky ;)

That kind of messed up :D

Hey @Alan o/

user228700

5:04 AM

Everybody shares questions and help each other to arrive at the answers. That's not messed up.

yes?

@AlanWatch Nothing, I just said 'hi' ._.

@Kaumudi I don't see any answers that have been arrived at ._.

how did you know I was here?

user228700

You haven't looked properly, then. In any case, it's been sort of dead for the past few days.

@AlanWatch Have a look at the right ;)

@Kaumudi :'(

5:06 AM

mobile chat lacks some features

@AlanWatch Ah! Sowwie

user228700

^ Nope.

^ o_O

user228700

user image

Wait, why do you get to be placed above me? That sucks!

5:08 AM

I thought that window shows subscribed users and not the one that are active

user228700

Haven't u noticed that the person who has just spoken shifts to the front?

user228700

Aaaanyway. Gots to go, bye!

@AlanWatch Oh no! Just about anyone who's entered the room shows up there.

@Kaumudi \o/

I was reading a page on jet fuels but I couldn't find why more compressible fuels like kerosene are preferred?

jet fighter uses kerosene because it is highly compressible

5:54 AM

1

Q: Why does burnt hair smell bad?

When I use hot stuff like hair straightener on my hair, my hair begins to smell bad which is different from smell produced by burning other things. So what gas is produced in this process that's responsible for the smell?

everyday-chemistry

user246160

6:15 AM

@paracresol Try asking a question there. Answers do fall out of the sky :).

6:37 AM

@Hippa Salut o/

Alors qu'est-ce que tu fais?

@paracresol \o

Just woke up

:D

How very...anticlimatic ;D

>.>

^_^

!!img/breakfeast

6:41 AM

No result found.

:(

XD

!!wiki/baguette

A baguette (English pronunciation: /bæˈɡɛt/; French pronunciation: [baˈɡɛt]) is a long thin loaf of French bread that is commonly made from basic lean dough (the dough, though not the shape, is defined by French law). It is distinguishable by its length and crisp crust. A baguette has a diameter of about 5 or 6 centimetres (2 or 2⅓ in) and a usual length of about 65 centimetres (26 in), although a baguette can be up to a metre (39 in) long. == History == The word "baguette" was not used to refer to a type of bread until 1920, but what is now known as a baguette may have existed well before that...

I broke a tooth biting down into one of those -_-

Wat :o

How old was it

2

6:44 AM

@Hippalectryon It was supposed to be made on the same day ._.

I was in the 4th grade back then ;P

The inside's pretty soft, but the crust's like a rock >.<

Real baguettes aren't that hard

That was the last of my Milk Teeth ._.

Previously I broke one, trying to bite into an apple :P

I guess you just have glass teeth :D

...

Honestly, when the Germans attacked you guys, you should've used baguettes as ballistic missiles... far more devastating than the German V2 ;D

Welp I gtg, got work to do :(

@paracresol BaguetteMissile V1789

6:49 AM

@Hippalectryon Au revoir, mon ami o/

2 hours later…

8:49 AM

@paracresol Ukrainian Kawaii song of the Day:

КИЦЯ - Kycia - Little cat - Ukrainian children song

Kitsune (狐, キツネ?, IPA: [kitsu͍ne] ( listen)) is the Japanese word for fox.
But in this Ukrainian song, it is not "kitsune" but "kitsunya" ("little cat" or "dear kitten"; an endearing form of the word).

"Kycia" is "little cat" (endearing) too

So there are two endearing, hypocoristic forms of the word

2 hours later…

11:14 AM

8

A: Why does burnt hair smell bad?

Hair is largely (~90%) composed of a protein called Keratin, which originates in the hair follicle. Keratin is composed of a variety of amino acids, including the sulfur containing amino acid, Cysteine. Amino acids are joined to each other by chemical bonds called peptide bonds to form these lon...

@CowperKettle The kitten's cute, but the intro was kinda scary. So this is what Russian kids grew up listening to! ;D

@CowperKettle You're into anime/manga? ;)

I actually want to ping Jan...to let him take a look at the terminology (Jan's got a language fetish)...but I already pinged him a lot earlier today, and another one might just piss him off.

@paracresol don't capitalise names of chemicals

including names of proteins and amino acids

11:40 AM

@orthocresol I get that...a lot :D

I'm still half expecting you to chew me out for the last 'answer' >.<

@paracresol hmm, well, everybody has wrong answers

I downvoted, but don't take it personally, I downvote pretty much everybody here.

Except myself, but that's because the system doesn't let me.

I did admit to it: chemistry.stackexchange.com/election/2#post-60500

So, getting a downvote (from me) just means the content was not good in one way or another, in this case it's factual inaccuracy. Doesn't mean that you're a bad person, or stupid person. :)

11:59 AM

@orthocresol 'Course not! You are a Mod after all, so it is thy duty to mercilessly crush answers that are...well...wrong ;D

I'm perfectly fine with it, actually ;P

@Loong Hallo Kamerade o/

@orthocresol Perhaps I could do you the favour? 3;)

@paracresol hi

@paracresol You could bring me down to 1 rep and it would have no impact on my powers here. :D

^_^

@orthocresol Damn it! So...there was no point in me amassing sock accounts all this time? :O

By the way @ortho, did you answer that last question (the stronger nucleophile one) yet?

No, I didn't.

@orthocresol Alright seal! You're going to tell me why the hydroxide ion's a stronger nucleophile than the acetate ion, or else... 3:D

12:11 PM

The charge in the acetate ion is delocalised by resonance.

Yep...

Oh...

Bu...but...the +I effect of the methyl group!

...is tiny.

Welll....

Fine! I accept it!

Furthermore, you cannot compare the methyl group with a hydrogen.

:'(

12:13 PM

You have to compare the acetyl group (CH3CO) with the hydrogen.

@orthocresol But isn't the resonance taking place in the -COO- bit? So couldn't I just consider the methyl group separately?

If you are comparing a methyl with a hydrogen, then you would be comparing acetate with formate.

It's not like the carbonyl group has a resonance effect but is completely negligible in terms of the inductive effect.

@orthocresol ?

Didn't you say otherwise earlier?

I mean, you emphasised on resonance, but you said the inductive effect was tiny ._.

The difference between Me and H is tiny.

Ah yes.

12:17 PM

Furthermore, the comparison between Me and H is not relevant here.

user image

You need to compare the red portions.

You can't compare half the red portion on the left (the methyl group), with all of the red portion on the right (the hydrogen).

Oops, I mistyped the official bugreport tag "android-app" as "androidapp". Now I cannot change it anymore. Could an admin please correct that?

@mhchem Done.

I'm curious, why can't you change it?

Wow, that was quick!

I clicked on "edit question" and wanted to change the tag and got an error message along the lines of "you want to use 'android-app', but a tag 'androidapp' already exists".

I AM A ~~ROBOT DESIGNED TO CARRY OUT MAINTENANCE TASKS EFFICIENTLY.~~ HUMAN.

@orthocresol Did you mod-edit my comment?

12:23 PM

Just another of SE's quirks...

@Loong Yeah.

@orthocresol aha!

I've mod-edited a few of those "related:" comments

0

Q: mhchem in Android app configured differently

Bugreport. Take a look at How to write physical units in the Android app (I did with version 1.0.89), you will see that \pu does not render on Android, while it does in the web version.

bug android-app

12:51 PM

@orthocresol Oh wait,I get it now!

@ortho so resonance sorta attenuates the charge? (Like in the acetate ion?)

yeah

Martin - マーチン

I missed her...

0

Q: Reaction of acetophenone and benzaldehyde and chalcone

I want to choose the best base and condition for realizing the mixed aldolsation of acetophenone and substituted benzaldehyde in order to obtain a chalcone

organic-chemistry reaction-mechanism

1:12 PM

Fill in the blank: Ich ohne dich ___ wie ein Sänger ohne Lied.

@Martin-マーチン

Martin - マーチン

???

I thought you speak German

well, should it be "bin" or "ist"?

@orthocresol could you help me?

Nein

why not?

I don't know any German, except for "nein", "Arbeit", and "gerade".

1:18 PM

@Martin-マーチン could you help me?

Well, as a good organic chemist I know "entgegen" and "zusammen" too...

@DHMO bin seems better ;0

@paracresol I have been told (presumably by native German) that it should be ist

Having played Mahler last year, I should know some musical terms too, but the only thing I can think of off the top of my head is "langsam".

Martin - マーチン

deutschsprachiger Raum

General discussion for german.stackexchange.com. You may speak...

1:21 PM

@orthocresol What about bremsstrahlung ;0

Martin - マーチン

try there, i don't have any time

@Mart o/

Martin - マーチン

@orthocresol as a chemist you should also know ungerade...

@DHMO Who told you that?

and gerade :D

Zwitterion (From Zwei)

@Martin-マーチン I forgot about ungerade, oops...

Martin - マーチン

1:23 PM

*flies away*

Gegenschein

@DHMO I without you, am like a singer without a song. So bin feels right. ist means ''is''.

@paracresol well I need an opinion from a native German

But, who told you that?

afterall, we say "I which is ..." instead of "I which am ..."

@paracresol ich will nicht sagen

Wait @DHMO, who do you plan on hitting on? Not @Kau I hope ;P

@DHMO I'll make you ;)

user228700

1:29 PM

O_o Dude, what is your problem?!

@Kaumudi don't you mean doubt? ;)

user228700

:-P Lol.

@DHMO o_o

@DHMO "I who am"?

@paracresol "It is I who is at fault"

Personally, I would say "It are me whom be at fault", although I have no English qualifications so you may or may not trust me.

1:44 PM

@Kaumudi Es war ein Scherz

@DHMO Oh...yeah ._.

@Mart X'D

in g-block elements, 3 hours ago, by Martin - マーチン

user image

user228700

@paracresol -___- U make that joke far too many times for it to be funny still.

@orthocresol wow, I've never thought about that

Martin - マーチン

@orthocresol are?

@paracresol what about diamond?

@Martin-マーチン Es war ein Scherz

Martin - マーチン

Fault, oh, thou shalt be mine.

1:48 PM

@Kaumudi How did you figure out Scherz meant "joke"? I was going to use Witz, but that was far too common...you'd have figure out easily. @Mart only 'taught' me Scherz like a month back ._.

Martin - マーチン

and look what I found today....

user image

from when i was in university :D

0

A: Fill in the blank / Füll die Lücke aus: „Ich ohne dich ___ wie ein Sänger ohne Lied."

If "Ich ohne dich" is meant as description of a state (Der Zustand), "ist" is right. Otherwise, you rather said "Ich bin ohne dich wie ein Sänger ohne Lied", and bin belongs to Ich then.

user228700

@paracresol Google translate. I don't know any German.

2:04 PM

in g-block elements, Oct 11 at 10:34, by Martin - マーチン

ein scherz

@Kaumudi Fahr zur Hoelle

@DHMO Didn't I tell you that? :3

@paracresol well, du sagtest, dass es "bin" sein sollte

How could you not know any German?! :O Shame on you! -_-

You must be knowing at least some German?

@Martin-マーチン I think, I know these fume hoods. Looks like Hans-Meerwein-Saal. :-)

Coincidentally, the first bit of German I came across was Sieg Heil back in the 4th grade ;P

Martin - マーチン

@Loong O.O

but look closer ;)

2:19 PM

Of course, I didn't know what it meant, much less, what it symbolised back then ._.

@Loong But...I don't see a fume-hood there ._.

@paracresol The picture was taken inside the hood.

@Loong How can you tell there was a fume-hood there, much less figure out the brand?

@pH So you've returned ;D o/

Martin - マーチン

@Loong did you see it?

@Mart I'm confused here ._.

Martin - マーチン

y?

2:28 PM

How does Loong know that's in a fume-hood?

And how the heck could he even guess the brand??

:O

Martin - マーチン

when you've been there... you just know

yesterday, by paracresol

@Loong How can you tell just by looking?!

@Loong X'D

@Martin-マーチン Do I get to come over too? :3

Martin - マーチン

that building is closed now and to be demolished

@Martin-マーチン Now it sounds like a secret society.

2

Martin - マーチン

2:34 PM

haha... but I guess y'all not found why this picture is funny

@Martin-マーチン Klaere mich auf

Martin - マーチン

just look closely

user228700

@paracresol Nope. What's the big deal? I know plenty of people who don't know any German.

@Martin-マーチン HAHAHAHA! X'D

user228700

@paracresol You're a very pleasant person. Where's that ignore button, now, hmm...

2:40 PM

!!wiki/Russian Standard (vodka)

Russian Standard (vodka)

Russian Standard (Russian: Русский Стандарт, Russkij Standart) Vodka is a major Russian premium vodka brand. The brand was founded by Roustam Tariko in 1998 using the principles developed for vodka established in 1894 by famed Russian scientist Dmitri Mendeleev. == History == The brand was introduced as the "Russian Standard" vodka in 1998 by the Russian Standard company of Roustam Tariko. The Russian Standard, later called Original, vodka established the brand as one of the top premium vodka brands in the Russian market. Its new Russian, Soviet-free identity, turned (unusually for a prem...

@Kaumudi Left click the display photo on the right. Click the "Ignore user" button at the bottom.

user228700

Thanks!

@Kaumudi Bitte

The h-bar? I hate that place -_-

user228700

Dammit, @paracresol: Ignore the invite. Pressed the wrong button.

2:43 PM

The Periodic Table's my turf...not the h-bar ._.

@Mart Well Mendeleev was a chemist after all...so I see why vodka runs in your blood ;D

I can't believe @Jan's missing out on all of this X'D

3:01 PM

@Kaumudi Kama sutra? Oh my, you're quite the seductress aren't you 3;)

1 hour later…

4:12 PM

@hBy2Py :D

> One word: Flatulence

4:55 PM

@paracresol Somebody was gonna go there.

:-D

5:28 PM

@hBy2Py Yeah... you X'D. That comment is still making me giggle. Way to go Brian! ;P

1

A: Why is the boiling point of stibane higher than that of ammonia

Though it does go against your intuition, you've actually mentioned the answer in your question. Stibane has a higher boiling point than ammonia/azane on account of van der Waals' interactions (owing to the larger size of the antimony atom). Our teacher had actually posed this question to us dur...

5:48 PM

I like the numbering here :3

user image

So, watcha doin' Brian?

@paracresol Just finished drafting my part of a big proposal. Passed it off to my boss for final review/processing 15min ago or so.

Have been writing, writing, writing, writing for the last 3+ weeks straight.

I now get a chance to let my brain relax - it feels sort of oozy at the moment.

@hBy2Py Oh, kinda like @Jan's "thesis"? ;D

Heh, probably not that bad. The report I finished up before this was about on par with an undergraduate research thesis.

@hBy2Py Let me dig up something @Cowper sent me a while back...I loved it! I found it very relaxing :3

Dammit! I need to get 5 more rep before the day ends to inch closer to the 'Legend Badge'. The tension's killing me ;P

AHA! Found it!

2 days ago, by CowperKettle

Pachelbel Canon in D Major - the original and best version

Ah, classic classical, indeed.

On that theme...

Rockelbel's Canon (Pachelbel's Canon in D) - 4 Cellos - The Piano Guys

6:01 PM

Aaaand....I just got the 5 rep I need! B-)

@hBy2Py I see you aren't a stranger to this ;P

Hmmph. I still haven't ever gotten Mortarboard.

Few of my answers get a lot of attention.

@hBy2Py I think I got it once...a while back 3:)

@hBy2Py I got 205 rep today, but it was split over two answers ._.

Well, if you're on your way to Legendary, you'd've gotten it the first time you hit the rep cap.

No wait...I don't have the Mortar board :(

@hBy2Py I know there's a rep cap of 200, but I just got 205 rep today. So what happens to the 5 rep? O_o

@paracresol It gets absorbed into the ether.

According to the main site list, you do have Mortarboard. It probably just hasn't propagated to your profile yet.

6:07 PM

@hBy2Py Oh wait, looks like I need another 10 rep :( The rep cap doesn't take into account the 15rep 'accept answers' give you. Damn!

Interestingly, it must count for Mortarboard - the site shows you has having earned it.

@hBy2Py Bu...but...the Michelson-Morely experiment proved that if aether did exist, it was an unnecessary hypothesis.

@paracresol That was only for IRL. The Internet absolutely does have aether.

;-)

user image

@hBy2Py So the bug works to my advantage, heh heh 3:)

Ah, that just means that you can earn more than 200 rep per day, actual accumulation.

The wording on Mortarboard should be changed, I guess.

6:11 PM

@hBy2Py Can you do it, or do Mods only get to do it?

@Martin erratum

@paracresol I think only the SO overlords can do it... right, @Mart/@ortho/@Loong?

Yay! Another 49 more daily 200rep to be earned before I hit the 'Epic' badge! :'(

@paracresol Badges, man. Weeks or months of thankless toil, punctuated by insane bursts of adrenaline-fueled ecstasy.

Nov 2 at 2:07, by pentavalentcarbon

When I die, I'm not gonna say, "I wish I got more badges on my Stack Exchange sites".

I had to star that :D

user image

@paracresol <nod>, Chem.SE is small enough that there just is not a lot of rep sluicing around.

6:18 PM

@hBy2Py John Rennie has it easy at the Phys.SE -_-

<nod>. Take, e.g., SuperUser:

user image

@hBy2Py Those @$$#*%!$ X'D

@paracresol Housekeeping on SU and SO are crazy, though.

By the way, how much time did it take for you to do this?

30

A: Why isn't ethane used for cooking?

In both cases, there appears to be a confusion of terminology between common and technical uses. We commonly use methane and propane for cooking (and home heating), but not ethane. I would expect ethane to be suitable for this, being in between the two, but I've never heard of anyone using ...

The 'Close Votes' queue hovers around 1000 items more or less continuously.

6:22 PM

@hBy2Py I guess The Workplace is the worst ;)

@paracresol Under a couple of hours, don't remember exactly.

@paracresol <shudder> Workplace and Parenting are both really fraught.

Too many conflicting, strongly-held opinions. I wouldn't be able to stand being heavily involved on sites like those, I don't think.

@hBy2Py Ooh, that bad? But I guess that makes getting the Reviewer and Steward badges easier?

@paracresol Absolutely. You could spend an entire day doing nothing but churning through the review queues.

@hBy2Py It gets my upvote at any rate. That was a good question and a good answer :3

Of course, I think they have huge problems with robo-reviewers.

Thanks!

6:25 PM

@hBy2Py Joining 'em? :) It sounds tempting

I mean, when you want to while away your time, that is ;P

@hBy2Py Bitte :D

Hm... it's danke schön or somesuch, right?

@hBy2Py Nope, Bitte is 'Welcome', Danke schoen is "Thank you" ;)

Oh, right, I mean I could've said danke schoen. (schön == schoen?)

Yes, yes you could ;P

haha

6:30 PM

And yeah schön == schoen

well, I have vague plans to put my dozen or so Duolingo German lessons to some use.

I was too lazy to open the MS Word file on my desktop to copy-and-paste the umlaut o. In cases like that, it's acceptable to use -oe- instead of ö :)

In the same way you come across Führer and Fuehrer :P

AHA @hBy2Py! So you're the one that answered this? I recall running into it a couple of months back, but I didn't make not of the author's name ._.

16

A: If you put two blocks of an element together, why don't they bond?

Why, when you bring the two bars together so that they touch each other, do they not instantly bond with each other forming one larger bar or block? ... Why do we need to 'weld' two bars together - why don't they just bond on their own? The problem is generally one of two things: gases (air)...

upvotes it

By the way, didn't Feynman once say something like this?

> But, in order to get it to work with large pieces of metal, you have to (1) get all the air out of the way, and (2) you have to clean both surfaces very thoroughly in order to remove all traces of surface oxides, and (3) you have to make sure both surfaces are perfectly matched, either precisely flat or with precisely the same curvature.

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