C to a ratio for hexagonal close packed (c/a=1.63)

In this video, Parisa works through the calculation of the c:a ratio for the hexagonal close packed HCP) crystal structure. The final answer is c/a = (2sqrt2)/sqrt3 = 1.63.

[@DavidTrejoG]

Top 10 anime cliffhangers

[@ThePabler6]

Hahahahahhhahahahah

[@magn8195]

Haha XD

[@BonfireJockey]

Fuuuhhhhh me

[@nithyashreegunasekaran1368]

Bro r u in final year now? 🤣

[@DavidTrejoG]

@@nithyashreegunasekaran1368 I'm doing my PhD now :)

[@Rich-Richards]

You put something hard - in an understandable way. Great teaching style :)))

[@afrinakhanam4696]

Why didn't you film the video till the end? This is a very good explanation. She is solving it in the easiest possible way. Thanks for uploading!

[@Nana-gn3cq]

This is actually really easy to understand! she explained it so well. Thank you so much!

[@natchr5646]

I am extremely impressed by such a simple way of Your teaching .....
Thank you very much......

[@locoporCristo976]

In my country we are used to say things like: Vine buscando cobre, pero encontré oro. It means that I was looking for something but instead I found some other thing that overpass my expectations.
Congrats lady

[@muhammedeminakdeniz1020]

'i came looking for copper and i found gold' :)

[@kevinsierra7415]

X2 amigo

[@LuizEnger]

Thank you for this video! I know that just the ending is wrong, but never mind that.

[@milka8925]

Thank You! I was so tired and staring blank at my homework. Really helpful :)

[@cielmilstrey2033]

Thanks! I could not understand at all how to approach this problem and this helped a lot.

[@armaneftekhari8283]

As a Iranian person you mede me proud...
It was excellent 👍

[@jatindave1869]

Hello , Please note that there is a calculation error , the end result should be 2√2/√3

[@victordanielsilvestreramos5674]

thanks lady... i'm from peru and your lesson was very good

[@sehatullah5837]

your teaching method is good so keep it up.

[@chimwemwemagolowondo4556]

beautifully explained.

[@shivansh8112]

0:28 no one is always perfect cutie!!😁

[@akashdip2001]

The easiest way ❤❤❤ Thanks mam 🌱

[@pritom7298]

explained so well..
also love ur cute voice miss.....🥰

[@kashetesami4429]

Thank you Parisa, this helped greatly!

[@ReckedNation001]

Really great explanation so easy to understand great lecture at a young age great journey ahead on ur career ma'am

[@gb469x]

Thank you so much Concise and clear. Perfectly suitable for last minute work XD

[@tanujchamil]

So true 🤩

[@AnkitVarshneyLordCalyx]

the final is somehow wrong.....
it should be c=(2√2)a/√3

[@daniyala5977]

+Ankit Varshney Yes they have corrected that in the annotations.

[@ahmednouh9347]

Ankit Varshney you're right

[@billalhossain-es7ff]

yes you are right..

[@SimplyAndy]

YOU ARE RIGHT

[@kaushikkumar6374]

Ankit Varshney damn ....what the coincidence

[@gauravcr3603]

fell in love with the subject and the teacher too❤❤❤

[@HM-dm3qg]

No you didnt.

[@JohnSerjeantson]

Pretty disgusting to see all these people commenting on her looks. It's really not relevant to the video and I'm sure she just finds you all pretty creepy.

[@moobaa420]

Agree completely! I could not believe what I saw when I scrolled down to the comments in order to see what relevant questions people might be asking - how are there more comments about her looks than about the subject of the video? It's like these horny boys have never encountered a human female before....

[@HM-dm3qg]

True that.

[@scrunklepunk]

I thought the comments were going to be about the mid-sentence cutoff. I'm pretty surprised.

[@sumonnihar0711]

Men will be men

[@danishsharma7110]

calm dear I was confused which video should i see found her preety came here

[@alemran8698]

If we had a teacher like you mam❤️

[@mathematicslover7385]

I am from India...ma'am
Nice way to explain

[@yashasgowda4897]

If i would had like this beautiful knowledgeable teacher i was not bunking tat class

[@dinkyjangra7400]

Thank you so much... You made it so easier...

[@jayasrijaishankar6727]

You really made me understand this very well thank you 💗💗

[@arashsepehri6173]

Thank you Parisa

[@kearikiinatio3244]

thank you so much for sharing ... it's very easy to follow what you explain.. bravo.👍
it helped me..
merci beaucoup

[@aminanazihaberdjane7552]

You just helped me do my homework xD I get it now. Thank you kindly!!

[@laurencelstewart]

I haven't seen a single video on youtube that gets this right.

[@naveen_devinda]

keep these material science explanations going :thumbsup:

[@chrisman5237]

NOT BAD AT ALL.. REALLY HELPFUL.. THANKS

[@15-manikkamv56]

Thankyou so much ...easily understood...hats off sister

[@jer.archives]

Did it hurt? When you fell from heaven.

[@jhonnyervalencia2924]

Cute and smart, the whole package. Thank you Parisa.

[@voxelsama]

lol, smart?

[@voxelsama]

she needs to focus more on her computational skills and less on drawing pretty pictures.. then again, it is materials engineering...

[@dabulls1g]

considering she's the one doing this video and not you, i would wager that she's far more intelligent in this subject than you may hope to be at your age.

[@dabulls1g]

also if you understood how important it is to have an accurate and clear depiction of the surface you're working on in order to be a decent purveyor of complex information such as solid state physics, you might see why it's important to focus on "drawing pretty pictures".

[@nishant.prakhar]

Thanku ma'am for this wonderful explanation

[@ajazkhan9168]

I love your teaching experience

[@vikram_Bhu]

Finally i got this complicated structure. The problem is related to book of Kittel

[@souparnadhar7034]

Can u show me.. How to calculate the distance between two planes in a hexagonal unit cell...

[@healthfitness7225]

Thank you maam my problem sol

[@zrogan6576]

holy peak

[@MakranBalochistan]

Nothing is wrong. Thanks for this lecture

[@Aidanryry]

how do you find the radius from the ratio?

[@ratansinghdhaliwal6425]

You are great teacher

[@aayushmaanmishra4749]

So simply cleared, thanks ❤️

[@SahanPerera-vo3xd]

Thankyou so much it helped a lot

[@pasankalansooriya3124]

Thank you for the explanation. Very helpful

[@Nomadic_1059]

The final expression is wrong..it should be √3 in the denominator .. isn't it??

[@rishudhawan8180]

maths in last step is wrong c=2(squr2)a/(squr3)

[@alialiyev6168]

One question. How did you know that hypotenuse is a/2?

[@davel7037]

The same way she got h=c/2

[@vanshrajput5363]

Cam anyone tell me last step at which video ended
Please tell 🙏🏻

[@kobalt63]

Practically: Is C then the minimum packing distance between Graphene sheets?

[@bruceyleonis3686]

I would turn up to every lecture if she was teaching me

[@sunilssvofficial9432]

Gorgeous concept of your mind....

[@syedwaqar9809]

Awesome ❤️ Thank you Miss

[@nishant0406]

Thank you so much 🙏✨

[@AshokKumar-og6yx]

One like for ur kind of explanation 👍

[@ETRizviAhamed]

Thank you mam for a nice and easy explain

[@indiraborah8244]

At the finishing ...
I think c is equal to 2root(2)a divided by root(3)

[@SunilKumar-tr3ih]

pretty good explanation ... but at the end you forget to put 3 under square root...

[@keval978]

Every time I watch her videos just to see her

[@raghavchauhan14]

how can we find the size of biggest tetrahedral and octahedral site in hcp unit cell?

[@sachinpraveen6249]

In diagram 2, shouldn't the line of length h pass through the centroid of the base triangle?

[@wa7dawelsalam]

Thank you very much you really simplified it alot

[@dustinkftw]

Ok, how is she using the properties of triangles to find X?
X is in 3 dimensions, when she solved for X, she actually just solved the projection of X on the surface created by a,a, and a

[@jihadghanim4276]

Excuse me there is error ! who you find this equation c^2/4=2a^2/3 with out negative signal for a^2/3?

[@nelsondeoliveira2931]

Thank you so much for your Help!

[@黃馨儀-r3w]

That's very useful. Thanks

[@juliocuellar1481]

helped me a lot, ty

[@urbananime5484]

nicely done!

[@rahulanand6015]

And Where the hell is square root of 3 in denominator???

[@maheshbabuchadalawada6615]

Very cute concept

[@xavierfernandis6272]

I thought the central atom of the .....2D hexagon fits into the void of the 3 atoms cental atoms of 3D hexagon .but her Ur taking as if they are (atoms)touching .

[@சிவபாலசோலங்கிசு]

beautiful

[@dremr2038]

What? The numerical or the .....??

[@marcbuonanni3248]

great explanation! Thanks

[@sairahul9803]

can you make a video on Calcium Fluorite structure, explaining its IPF

[@PINTUROY66]

Thank you ❤️❤️❤️

[@felipearacena8900]

thx thx

[@jithinmathews1522]

Did you not miss a root 3 in the denominator

[@parthamunshi94]

Jithin Mathews I was gonna say the same.

[@sayand03011]

Jithin Mathews yes she missed . bt who cares, she's cute

[@helloworld-sv1oi]

....??? Country?

[@RobertoSousas]

Thank you!

[@rahul8145]

What is that enchantment at 4:05 "socatoa" ???

[@nafrodin7984]

"SOHCAHTOA" stands for the trigonometric relations Sin(theta)=Opposite/Hypotenuse, Cos(theta)=Adjacent/Hypotenuse, Tan(theta)=Opposite/Adjacent :)

[@paulhetherington3854]

< /F'''o > pa' = 6'vt + c''''_cmd void cell = what file contains this in chemistry (CHmz) /
/display clipboard images an txt for AVNrd an grn = pP''' xr = c'''' etch hexagon graph linear markers freq structures / >

[@cbschinsharma6947]

FUCK YAAR CHEMISTRY LENI THI

[@jahidul_islam_60]

half of the time I spent watching you😅
You are very good at teaching and most importantly very BEAUTIFUL 🖤

[@eng.leomusiyiwa8908]

a very good explanation but try and rectify the final answer...thank you

[@nishantarya1164]

Great help but it's root3 not 3 in ans

[@curiousbit9228]

A total of six tetrahedrons in that one hcp lattice

[@madri00]

Great❤❤

[@puspendurana7501]

Lovely!!

[@anshikarawat7194]

thank you 😊. .

[@devta7730]

You just made the triangle opposite the triangle should be made by taking three atoms which are in the body

[@AAKASHRAJaakash]

it should be root of 3 in denominator

[@sabarishbitsabari2514]

cant you find the mistake over there.its 8a power 2÷√3.

[@steveg5784]

How is it that in real HCP metals, there are no ideal c/a ratios? They is no such beast! They are all squashed or stretched to a greater or lesser degree. Face centered cubic metals have uniform bond lengths. HCP metals do not have uniform bond lengths, but that seems to be ignored in favor of an imagined ideal.

[@drkaleemahmad6893]

I need contact number of this faculty member?

[@asmadral4489]

Thank you so much but c=a* 2×(√(2÷3))

[@adventureclaude]

+Basma hate It's so sad because she only messed up the last line of working :(((

[@asmadral4489]

+adventureclaude
🎩
😁
👕👍Great!
👖

[@mohammadsalah6223]

Wow thank you very much