Topic Content:
- Definition of Area Expansivity
- Calculations on Area Expansivity
When substances are heated, there is an increase in length, breadth and height, hence area and volume also increases.
An increase in area of a solid when heated is called area or superficial expansivity.
Therefore;
Area Expansivity = β
\(\scriptsize (β) = \normalsize \frac {Increase \: in \: Area}{Original \: Area \: \times \: Temperature \: Change}\)\(\scriptsize β = \normalsize \frac {A_2 \: – \: A_1}{A_1 \: \times \: (\theta_2 \: – \: \theta_1)}\)
A2 = New area
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