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+clear;

+clc;

+printf("\t\t\tExample Number 1.2\n\n\n");

+// heat loss through a glass window 

+// illustration1.2

+// solution

+

+L = 0.015; // [m]Thickness of glass window

+dT = 20-(-5);//[degree celsius] temperature difference

+

+A= 0.5;//[m^2] surface area of the glass window

+//calculating rate of heat flow across the brick wall

+k=0.78;//[W/m degree celcius] thermal conductivity of the glass window

+q = (k*A*dT)/(1000*L);//[kW] rate of heat loss

+t=2;//[h] time in hours

+H=q*t;//[kW.h] total heat loss in time t 

+printf("Total heat loss across the glass window in 2 hours is %f kW.H",H);