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Question
Give the expression for linear thermal expansion.
Solution
Linear Expansion: In solids, for a small change in temperature ∆T, the fractional change in length `((Δ"L")/("L"_0))` is directly proportional to ∆T.
`(Δ"L")/"L"_0 = α_"L"Δ"T"`
Therefore, `α_"L" = (Δ"L")/("L"_0Δ"T")`
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