initial commit / add all books

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+//Exa 3.8

+clc;

+clear;

+close;

+//given data

+T_0=150;// in degree C

+T_infinite=40;// in degree C

+w=1;// in m

+t=0.75*10^-3;// in m

+d=5*10^-2;// in meter

+L=25*10^-3;// in meter

+k=75;// in W/mK 

+h=23.3;// in W/m^2K

+N=12;// numbers of fins

+Ac=w*t;//in square meter

+rho=2*(w+t);// in meter

+delta=Ac/rho;

+L_c=L+delta;

+ML_c=L_c*sqrt(h*rho/(k*Ac))

+q_fin= N*sqrt(h*rho*k*Ac)*(T_0-T_infinite)*tanh(ML_c);

+q_fin=floor(q_fin);

+A_0=%pi*d*w-12*Ac

+q_unfin= h*A_0*(T_0-T_infinite);

+q_total=q_fin+q_unfin;

+disp("Rate of heat transfer is : "+string(q_total)+" watt");