% This program has an error in it. Your goal is to find the error and % fix the program so it will work. Use the error message you get as a clue % to fix the problem. 

% This program calculates the heat transer rate per unit area of a furnace % wall. The basic heat transfer equation for conduction is given by % q=kA(T2-T1)/d where q is the heat transfer rate, k is the thermal % conductivity - a material property, A is the surface area of the items in % contact and d is the thickness (depth). In this case we want heat % transfer rate per unit area so q/A = k(T2-T1)/d. If you do this % calculation on your own, the units need to line up. Make sure the units % in k go with the units for temperature and length that you use for A, d % and T.

% Initialize variables ThermalConductivity=0.3; % fire clay for a furnace wall in Watts/(meter*Kelvin) TempInside=650; % This is in C, which I can get away with because delta C = delta K TempOutside=150; % also in C Thickness = 0.1524; % 6 inches in meters

HeatTransferPerArea=(Thermalconductivity * (TempInside-TempOutside))/Thickness;

fprintf('Heat transfer per area is %.2f Watts/square meter',HeatTransferPerArea);