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

[@wesleysorenson5583]

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 :)))

[@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......

[@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!

[@cielmilstrey2033]

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

[@LuizEnger]

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

[@kashetesami4429]

Thank you Parisa, this helped greatly!

[@milka8925]

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

[@victordanielsilvestreramos5674]

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

[@sehatullah5837]

your teaching method is good so keep it up.

[@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

[@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

[@naveen_devinda]

keep these material science explanations going :thumbsup:

[@gb469x]

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

[@tanujchamil]

So true 🤩

[@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.

[@sumonnihar9037]

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❤️

[@ReckedNation001]

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

[@ajazkhan9168]

I love your teaching experience

[@chrisman5237]

NOT BAD AT ALL.. REALLY HELPFUL.. THANKS

[@kearikiinatio3244]

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

[@aayushmaanmishra4749]

So simply cleared, thanks ❤️

[@jayasrijaishankar6727]

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

[@mathematicslover7385]

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

[@aminanazihaberdjane7552]

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

[@pasankalansooriya3124]

Thank you for the explanation. Very helpful

[@arashsepehri6173]

Thank you Parisa

[@kobalt63]

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

[@dinkyjangra7400]

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

[@15-manikkamv56]

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

[@nelsondeoliveira2931]

Thank you so much for your Help!

[@sachinpraveen6249]

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

[@chimwemwemagolowondo4556]

beautifully explained.

[@pritom7298]

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

[@raghvendrachauhan5131]

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

[@urbananime5484]

nicely done!

[@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

[@syedwaqar9809]

Awesome ❤️ Thank you Miss

[@marcbuonanni3248]

great explanation! Thanks

[@akashdip2001]

The easiest way ❤❤❤ Thanks mam 🌱

[@juliocuellar1481]

helped me a lot, ty

[@nishant.prakhar]

Thanku ma'am for this wonderful explanation

[@RobertoSousas]

Thank you!

[@MakranBalochistan]

Nothing is wrong. Thanks for this lecture

[@jhonnyervalencia2924]

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

[@andrewvirtual]

lol, smart?

[@andrewvirtual]

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".

[@user-yr2xu6ww3r]

That's very useful. Thanks

[@gauravcr3603]

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

[@HM-dm3qg]

No you didnt.

[@vikram_Bhu]

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

[@felipearacena8900]

thx thx

[@Aidanryry]

how do you find the radius from the ratio?

[@laurencelstewart]

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

[@ETRizviAhamed]

Thank you mam for a nice and easy explain

[@ratansinghdhaliwal6425]

You are great teacher

[@sairahul9803]

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

[@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?

[@nishant0406]

Thank you so much 🙏✨

[@SunilKumar-tr3ih]

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

[@AshokKumar-og6yx]

One like for ur kind of explanation 👍

[@indiraborah8244]

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

[@rishudhawan8180]

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

[@KhalidAfquir]

Thank you

[@souparnadhar7034]

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

[@puspendurana7501]

Lovely!!

[@damayantisethy5205]

thnx it really hlpd me

[@maheshbabuchadalawada6615]

Very cute concept

[@sunilssvofficial9432]

Gorgeous concept of your mind....

[@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

[@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 .

[@jonathanpepper9743]

awesome thanks!

[@saracrew]

thx a lot~!

[@user-wo7tp3mv1o]

thanks ^^

[@ashu26jha]

Simply thnx!!

[@curiousbit9228]

Thanks!

[@vanshrajput5363]

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

[@vivan66]

Thank you ❤️❤️❤️

[@mohammadsalah6223]

Wow thank you very much

[@helirobertomirandaojeda1783]

Muchas gracias

[@eng.leomusiyiwa8908]

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

[@user-jn6kc3uu9v]

beautiful

[@dremr2038]

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

[@PavanKumar-dw2zb]

Thanks a lot

[@alxomana]

😍 tks a lot!!

[@curiousbit9228]

A total of six tetrahedrons in that one hcp lattice

[@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 :)

[@Natalia-ww5kt]

thanks

[@bruceyleonis3686]

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

[@madri00]

Great❤❤

[@healthfitness7225]

Thank you maam my problem sol

[@sureshchinnadurai4707]

Derivation some what not clear. something new learning about c/a i got

[@AAKASHRAJaakash]

it should be root of 3 in denominator

[@thescienceboard1581]

very helpful

[@anshikarawat7194]

thank you 😊. .

[@anabeatrizgonzalez166]

very good

[@jhoanguzman4397]

super!

[@bindudevi8601]

Mam u r awesome

[@Nomadic_1059]

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

[@sidarmesutruzgar]

face of paradise ^.^

[@allenjen4173]

Thanks

[@sabarishbitsabari2514]

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

[@alexvieira2039]

I loved