MY CART (5)

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price:

There are no items in this cart.
Continue Shopping
                   

height of hcp unit cell


 

3 years ago

Share

Answers : (1)

                                        

Dear Mukal,


A,B,C,E (red dots) will represents the centres of sphere of atoms in HCP closed packing,


now, AB=BC=CA=EB = 2R (edge lengths of HCP)


BD=\frac{2R}{\sqrt{3}}  ,as BD divides the median through B in 2:1 ratio from B...


now EDB is rt. triangle,


by pythagores theorem :


(\frac{2R}{\sqrt{3}})^2+h^2=(2R)^2


=> h=2R\sqrt{\frac{2}{3}}


now, their will be another atom which will be mirror image of E on plane ABC


so, the height (c) of HCP will be 2h


c=2h=4R\sqrt{\frac{2}{3}}


Best Of luck


Cracking IIT just got more exciting,It s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and win by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple  to download the toolbar….


So start the brain storming…. become a leader with Elite Expert League ASKIITIANS


Thanks


Aman Bansal


Askiitian Expert



3 years ago

Post Your Answer

More Questions On IIT JEE Entrance Exam

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
i have take no coaching and i start just 10 day before jee main exam and expecting around 110 marks and 80% in cbse should i drop or can i get goood collage
 
 
if u are general category then your score is not enough for qualifying for jee main but you must prepare for other exams like bitsat and vitee in my opinion drop is very big decision and...
 
ng29 19 days ago
 
focus on ipu and viteeee approve if useful approve if useful approve if useful approve if useful
 
ng29 19 days ago
 
then can i get i desent college of this marks or am starting to focussing on ipu and viteee
 
rahak 19 days ago
if i crack iit jee main xam can i seek admission in iit for btech
 
 
Dear student, You need to qualify JEE mains for NITs and JEE advance for IITS
  img
Nishant Vora 26 days ago
 
Use the formula book for instant revision Visit the below website imojo.in/formula Use Coupon Code EXAMHACKERS20
 
EXAM HACKERS 25 days ago
I am a foreign citizenship holder.(Tanzanian). Is there a foreigner’s quota for admissions in IIT ? Which IITs give such quota and in which fields ? How much rank is good enough to get...
 
 
Yes of course, there is NRI reservation scheme in IIT-JEE. Please check the prospectus once, You will get whole info.. Good...
  img
Saurabh Kumar 5 months ago
 
@saurabh kumar can u please give the link of the prospectus ? i cant find it oline ? thanks ! -ayush.
 
Ayush Mehta 5 months ago
 
@saurabh kumar can u please give the link of the prospectus ? i cant find it oline ? thanks ! -ayush.
 
Ayush Mehta 5 months ago
Sir, I want to know that to get CS or IT branch in any of the seven IIT's want minimum rank or the position I must took in merit list so that I may able to get this branch in IIT's....
 
 
Dear sarvesh Gupta Please check the given link to know the detail of opening and closing rank of different branch of all the IITs. http://www.askiitians.com/iit-jee-2009-rank.aspx Please...
 
Badiuddin askIITians.ismu Expert 5 years ago
How can I be good at Math????? I will surely approve! I want to be good in math because I literally like SUCK at it. Math is like soooooooo hard. How to I be good at it????
 
 
Hi Student, Please mention the class in which you are studying, so that i can give you better guidance.
  img
Harishwar one month ago
 
Math is easy through practice and dedication. If you have one of those attitude that just cannot be bothered to learn some equations, for example, you're not going to be successful. 1. Be...
 
vikas yadav one month ago
 
u must take a book that contains solved questions to make ur hold on that chapter practice as many good que as u can never left ur doubts uncleared bcoz in maths some chapters are...
 
ng29 12 days ago
how to crack aiims easily
 
 
C buddy... nothing in this world comes without hard work...so work hard even I m preparing for aiims.. n even I at times feel ..this.. so just keep faith in or work.. if u want we can...
 
Akhila joshi one month ago
View all Questions »