Before going to solve this question first we have to understand planar density of a crystal lattice.
Planar density of a plane is given defined-
Where N is number of atoms centred in the plane and A is the area of the plane.
As per the question we have been given silver.
We know that silver is a face centered cubic crystal. i.e FCC
The radius of silver [r] is given as 0.144 nm.
.
Hence radius 
We have to calculate the PD of [100] plane of silver.
The area of [100] FCC is 8r^2 where r is the radius silver.
The number of atoms centered on [100] plane is 2.It is so because four atoms will be shared by four corners of the cube and there will be one central atom.Hence there will be only two atoms in one unit cell of [100] plane of silver.
Now we have to calculate the planar density PD.We know that-
![=\frac{2}{8*[0.144*10^{-9}]^2 }](https://tex.z-dn.net/?f=%3D%5Cfrac%7B2%7D%7B8%2A%5B0.144%2A10%5E%7B-9%7D%5D%5E2%20%7D)
[ans]
Answer:
Japanese created earthquake proof buildings
Explanation:
Countries like Japan where earthquakes are regular. So these important factors are downgraded to nice -to-haves behind the need of Japan structural stability. The Pacific ring of Fire and all its seismic activities are contributed to Japans strict building codes for skyscrapers and Towers. Building codes means, earthquakes proof structures are intended to withstand the earthquake.The prime example of an earthquake-ready country is Japan with its dedication to structural stability.
5 great examples are
1. Mori Tower
2. Tokyo Skytree
3. Ark Hills Sengokuyama
4.fa-bo
5. Television House
Answer:
Group IA elements have only one valency electron while Group IIA have two valency electrons.
Group IA elements have cations with higher charge density hence polarizing anions easier resulting into covalent character while Group IIA elements have cations with lower charge density hence difficulty in distorting anions resulting into a ionic character. This is due to difference in cationic radii and charges
Answer:
onservation of energy
U top = K bottom
(m + m)*g*L = 1/2*I*?^2 where I = m*(L/2)^2 + m*L^2 = 1.25*m*L^2
So 2m*g*L = 1/2*1.25*m*L^2*?^2
So ? = sqrt(3*g*/(1.25*L) ) = sqrt(12g/5L)
Answer:
I am going to guess it shows that the balloon is going downwards because the speed of rise is in the negatives for the last 2.
