Define the coefficient of superficial expansion.

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Solution

Coefficient of superficial expansion:
The ratio of increase in the area of the body per degree rise in temperature to its unit area is called the coefficient of superficial expansion.
Its SI unit is K^-1 but it is commonly expressed in C^-1.

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Define superficial expansion

The coefficient of superficial expansion of a solid is twice the linear expansion coefficient of the same solid.

2 \times 10^{- 5} /^{o} C

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