Question: 3 . 5 A thin isothermal disk, having a diameter of 1 . 8 cm , is maintained at 4 0 C and buried in

3.5 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 cm . The medium has a thermal conductivity of 0.8Wm*C and its surface is maintained at 15C. Calculate the heat lost by the disk.
3 . 5 A thin isothermal disk, having a diameter

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