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
what is the difference between latent heat and enthalpy? are they same??
 
 
LATENT HEAT Latent calefaction is the activity appear or captivated by a physique or a thermodynamic arrangement during a constant-temperature process Enthalpyof vaporization The enthalpy of...
  img
Sourabh Singh 5 months ago
A block is resting on a horizontal plate in the xy plane and the coefficient of friction between block and plate is μ. The plate begins to move with velocity v = bt 2 in x -direction. At...
 
 
Hi yash! as the plate begins to move frictional force acts on the block along the direction of velocity to prevent relative motion. when the force exceed the maximum static friction the...
 
PRATYUSH MISHRA 3 months ago
 
no not yet yash I am a student of class 11
 
PRATYUSH MISHRA 3 months ago
 
are you studying in an iit
 
yash 3 months ago
are computer based exams in aieee more difficult than paper and pen
 
 
That totally depends on how much familiar one is with the use of computers. If one uses computers on a regular basis, it actually becomes easier to attempt the paper online as it would save...
  img
Ravi 3 months ago
 
thanks sir
 
Mohammad Dilshad 3 months ago
aadg
 
how i qualify in iit jee
 
 
WORK HARD BECAUSE THERE ARE 30 LAKH STUDENTS WHO ARE GOING TO BE GIVING THE EXAM IN YEAR 2014 SO YOU CAN THINK OF THE DIFICULTY LEVEL OF IT BEST OF LUCK AND CRACK IT DOWN...
 
FITJEE one year ago
 
Just strongly determine and beleave yourself so that your confidence levels increases. be passionate about your goal so that you will reach your goal.
 
JAYAVARDHAN BAIRABATHINA one year ago
 
What an exaggerated figure you quote, my friend! Its around 12-13 lakhs atmost!
 
Pradyumna Sadgir one year ago
My category rank is 15429 in JEE mains merit list.and state rank is 657 I am interested in CSE and IT. Which NIT will I get.?? Will I get DAIICT?? Will I get IT in IIIT Allahabad?? Should I...
 
 
Hi, IIIts holds advantage over NITs and DAIIT. So IIIT is a good choice if a very good NIT is out of reach For a better idea, visit our college and branch predictor. Here is the link :...
  img
Yash Baheti 7 months ago
My brother’s son has got 1900 Rank in IIT -JEE Mains. Kindly Guide us wheather give preprence to brach OR Old IITs. We like higher payment branch with IIT tag. Some people say to opt for...
 
 
You should prefer branch than IIT, at the end of day branch at performance matters not IIT, cse and MnC both are good, but give prefrence to cse. sher mohammad faculty askiitans b.tech, iit...
  img
Sher Mohammad 8 months ago
 
Dear Mr.Mohammed, thank you for your valuable guidance. kindly inform order of IITs for opting CSE and other branches next to CSE . Plaese check this order and correct and guide 1. CSE...
 
HARISH BHARDWAJ 8 months ago
View all Questions »