initial commit / add all books

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+clc;

+warning('off');

+printf("\n\n example2.5 - pg31");

+// given

+d=0.0013;  //[m] - diameter of the tube

+delx=1;  //[m] - length of the glass tube

+T2=110.6;  //[degC] - temperature on one end of the rod

+T1=0;  //[degC] - temperature on other side of the rod

+k=0.86;  //[W/m*K] - thermal conductivity

+Hf=333.5;  //[J/g] - heat of fusion of ice

+// (a)using the equation (q/A)=-k*(delt/delx)

+A=(%pi*d^2)/4;

+q=A*(-k*(T2-T1)/delx);

+printf("\n\n (a) the heat flow is \n q=%fJ/sec",q);

+// (b) dividing the total heat transfer in 30minutes by the amount of heat required to melt 1g of ice

+a=abs((q*30*60)/333.5);

+printf("\n\n (b)the amount or grams of ice melted in 30minutes is %fg",a);