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r dr If the differential equation for the heat flow in the radial direction for a sphere can be dat 2 dT represented as prove

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r dr If the differential equation for the heat flow in the radial direction for a sphere can be dat 2 dT represented as prove that the thermal resistance of a spherical hollow dr shell with inside and outside radii of li and to respectively, can be represented as 1 1 1 dT R You may use the equation Q=-k4 where all symbols have dr usual meaning. = 4k

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