Question

What is the unit of coefficient of superficial (or surface) expansion?​

Answer 1

What is the unit of coefficient of superficial (or surface) expansion?

$\huge\sf\underline\pink{Answer}$

Superficial expansion is defined as the increase in surface area of the solid on heating.

If you consider at 0°C area of a solid is $\sf{A_{0} }$ then its area at t°c is given by:

$\sf{A_{0}(l+βt)}$.

• 6α = 3β = 2γ

$\red{\star}$This equation shows the relationship between α is the linear expansion, β is the superficial expansion, is volume expansion.

$\red{\star}$ These three coefficients of expansion for a given solid are not constant because these values totally depend on the temperature.

$\sf\underline\pink{Example;}$

Thermal expansion in our daily life are thermometers, riveting, on wooden wheels fixing metal tires etc.

$\sf\underline\pink{Thanks}$

Answer 2

Answer:

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