initial commit / add all books

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diff --git a/797/CH8/EX8.8.s/8_08_solution.sce b/797/CH8/EX8.8.s/8_08_solution.sce
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+//Solution 8-08
+WD=get_absolute_file_path('8_08_solution.sce');
+datafile=WD+filesep()+'8_08_example.sci';
+clc;
+exec(datafile)
+//function to evaluate friction factor using Colebrook's equation
+function [f] = colebrook(epsilon, D, Re)
+    f = 1;
+    fnew = (-1.8 * log10(6.9/Re + (epsilon/D/3.7)**1.11))**(-2); //Haaland equation
+    err = 0.0001; //maximum allowable error
+    //using fixed point iteration
+    while abs(fnew - f) > err
+        f = fnew;
+        fnew = (-2.0 * log10(epsilon/ D/3.7 + 2.51 / Re/sqrt(f)))**(-2);
+    end
+    return f;
+endfunction
+//unit conversion
+D = D / 100; //from [cm] to [m]
+Vdot = Vdot * 10**-3; //from [L/s] to [m^3/s]
+A_c = %pi / 4 * D**2; //
+V = Vdot / A_c;
+Re = rho * V * D / mu; //Reynold's number
+if Re < 4000 then
+    printf("As Re < 4000 flow is turbulent");
+end
+funcprot(0);
+f = colebrook(epsilon, D, Re); //friction factor
+sumK_L = K_Lentrance + 2 * K_Lelbow + K_Lvalve + K_Lexit;
+h_minor = sumK_L * V**2 / (2 * g);
+h_major = f* L/D * V**2 / (2 * g);
+h_L = h_minor + h_major;
+z1 = z2 + h_L;    //from energy equation between 1 and 2
+printf("Free surface of first reservoir must be %1.2f m above the ground level to ensure water flow between two reservoirs at 6 L/s", z1);
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