Physics
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A closed box is filled with dry ice at a temperature of 81.5 C, while the outside temperature is 27.4 C. The box is cubical, measuring 0.307 m on a side, and the thickness of the walls is 4.47 × 102 m. In one day, 3.37 × 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made.
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