initial commit / add all books

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diff --git a/2021/CH8/EX8.4/Ex8_4.sce b/2021/CH8/EX8.4/Ex8_4.sce
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+//Finding of Cv,Cd,Cc

+//Given

+H=5;

+d1=0.1;

+d2=2;

+t=30;

+h=0.45;

+x=1;

+g=9.81;

+y=0.052;

+H=5;

+//To Find

+A1=(%pi/4)*d2^2;

+Aq=(A1*h)/t;

+A2=(%pi/4)*d1^2;

+b=sqrt(2*g*H);

+Tq=A2*b;

+Cd=Aq/Tq;

+c=sqrt(4*y*H);

+Cv=x/c;

+Cc=Cd/Cv;

+disp(" Cd ="+string(Cd)+" No units");

+disp(" Cv ="+string(Cv)+" No units");

+disp(" Cc ="+string(Cc)+" No units");