Define the term 'coefficient' of linear expansion.
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The Coefficient of Linear Expansion can be definedas:
“The charge of alternate of unit length per unit degree trade in temperature” Assuming the effect of stress is negligible.
Metals: Coefficient of linear expansion \alpha _, at 20^, C (10^, K^)
Stainless steel: 10.1~17.3
Steel: 11.0~13.0
Copper: 17
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