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Thermal conductivity of a solid has diff...

Thermal conductivity of a solid has different values along different directions. What kind of solid is this ? Also comment on its melting point .

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It is anisotropic or crystalline solid hence, it has sharp m.p.
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Statement I: Two solid cylindrical rods of identical size and different thermal conductivity K_1 and K_2 are connected in series. Then the equivalent thermal conductivity of two rods system is less than that value of thermal conductivity of either rod. Statement II: For two cylindrical rods of identical size and different thermal conductivity K_1 and K_2 connected in series, the equivalent thermal conductivity K is given by (2)/(K)=(1)/(K_1)+(1)/(K_2)

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