Question: A thin isothermal disk, having a diameter of 1.8 cm, is maintained at 40C and buried in a semi-infinite medium at a depth of 2

A thin isothermal disk, having a diameter of 1.8 cm, is maintained at 40ºC and buried in a semi-infinite medium at a depth of 2 cm. The medium has a thermal conductivity of 0.8 W/m· ºC and its surface is maintained at 15ºC. Calculate the heat lost by the disk.

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