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+clc;
+clear all;
+disp("Net heat flux")
+t1=100;// degree C temperature of one surface of the slab
+t2=0;// degree C temperature of another surface of the slab
+L=0.25;// m thickness of the wall
+k=387.6;// W/(m*K) thermal conductivity of the brick
+q = k*(t1-t2)/L ;// = Q/A W/m^2 rate of heat transfer
+disp ("W/m^2",q,"the heat transfer rate is = ")