Question

define areal expansion of solids ❓

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Answer 1

⇒A−A0∝A0Δt. ⇒A−A0=βA0Δt. Where, 'β' is the coefficient of areal expansion. It is defined as the increase in area per unit original area at 0∘C per unit rise in temperature.

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Answer 2

• Substances expand when heated and compress when cooled, which is now a well-known phenomena. A body's proportions change as it is heated. It depends on the body's form.
• It is called Linear Expansion when the expansion occurs in length.
• When we heat a square tile, it expands on two sides: length and width; this is referred to as Area Expansion.
• When we heat a cube, all of its sides expand, causing the body's overall volume to grow, a phenomenon known as Volume Expansion.