initial commit / add all books

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diff --git a/3411/CH5/EX5.12.u1/Ex5_12_u1.sce b/3411/CH5/EX5.12.u1/Ex5_12_u1.sce
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+//Example 5_12_u1

+clc();

+clear;

+//To determine the cubic structure of element and lattice constant and to identify element

+ratio=(sin(20*%pi/180)/sin(29*%pi/180))^2

+printf("The ratio of sin(theta)^2 values for first and second angles is %.2f\n Hence the crystal structure is bcc\n",ratio)

+lamda=0.154   //units in nm

+h=1

+k=1

+l=0

+theta=20       //units in degrees

+a=(lamda/2)*(sqrt(sqrt(h^2+k^2+l^2)/sin(theta*(%pi/180))^2))           //units in nm

+printf("Lattice constant a=%.3fnm \n And the element is tungsten Since Tungsten has lattice constant of %.3fnm and crystallizes in bcc structure",a,a)

+//Given in textbook lattice constant as a=0.318nm but the correct answer is a=0.268nm

diff --git a/3411/CH5/EX5.12.u1/Ex5_12_u1.txt b/3411/CH5/EX5.12.u1/Ex5_12_u1.txt
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+The ratio of sin(theta)^2 values for first and second angles is 0.50

+ Hence the crystal structure is bcc

+Lattice constant a=0.268nm 

+ And the element is tungsten Since Tungsten has lattice constant of 0.268nm and crystallizes in bcc structure 
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