An experiment to measure the thermal conductivity of food formulations was carried out by measuring the surface temperature of the food formulations which were formed into a flat plate with a thickness of 3 mm. It is found that at steady-state conditions, there is a temperature difference of 35 ° C between the two surfaces, the heat transfer rate per unit area of ​​3500 W / m2 is measured near the center of the two surfaces. Calculate: the thermal conductivity of the product, = Answer W / m ° C

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