Question

Define superficial expansion

Answer 1

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$<b>If an object is such that one of its dimension is very small in comparison to the other two dimensions its expansion is effictively along with two dimensions only.$

We refer to this type of thermal expansion as superficial expansion.

Answer 2

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Superficial expansion is the increase in surface area of 1 meter square area of a solid for rise of temperature, 1kelvin is called the coefficient of surface expansion of material of that solid.

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