initial commit / add all books

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+//Exa 1.6

+clc;

+clear;

+close

+// given data

+T1=50;// in degree C

+T1=T1+273;// in K

+T2=20;// in degree C

+T2=T2+273;// in K

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

+h=6.5;// in W/m^2K

+l=1;//in meter

+epsilon=0.8;

+sigma=5.67*10^-8;

+A=%pi*d*l;// in Square meter

+q_conv = h*A*(T1-T2);// in W/m

+disp(q_conv,"The heat loss by convection in W/m")

+// formula q= sigma*A*F_g12*(T1^4-T2^4) = sigma*A*epsilon*(T1^4-T2^4)    (since A1<<A2, so F_g12=epsilon)

+q_rad = sigma*A*epsilon*(T1^4-T2^4);// in W/m

+disp(q_rad," Heat loss by radiation in W/m")

+q_total= q_conv+q_rad;

+disp(q_total,"Total heat loss in W/m is :")

+

+

+