A square sheet of cork of side 20 cm and thickness 3-0 mm is placed in contact of a square glass sheet of side 20 cm and thickness 5-0 mm- The outer faces of their composite sheet are maintained at 100-C and 20-C- the cork face being at higher temperature- Find the temperature of the cork-glass interface- The thermal conductivities of cork and glass are 0-063 and 0-72 W m-1 K-1 respectively-

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Standard VII

Physics

Conduction

A square shee...

Question

A square sheet of cork of side $20 c m$ and thickness $3.0 m m$ is placed in contact of a square glass sheet of side $20 c m$ and thickness $5.0 m m$ . The outer faces of their composite sheet are maintained at $100^{\circ} C$ and $20^{\circ} C$ , the cork face being at higher temperature. Find the temperature of the cork-glass interface. The thermal conductivities of cork and glass are $0.063$ and $0.72 W m^{- 1} K^{- 1}$ respectively.

{0.18}^{0} C

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{20.8}^{0} C

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{30.18}^{0} C

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18^{0} C

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Solution

The correct option is C ${30.18}^{0} C$

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