Question: A new insulation material for low temperature applications is being tested. The test consists of taking a 1 m x 1 m square of thickness

A new insulation material for low temperature applications is being tested. The test consists of taking a 1 m x 1 m square of thickness 10 mm and measuring the power (energy flow) required to maintain one side of the square (the inner face) at 40C and the outer face at -120C. If the measured power is 20 W, what is the thermal conductivity of the material? Comment on your result.

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