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Coefficient of linear expansion of iron ...

Coefficient of linear expansion of iron is `12 times 10^(-6@)C^(-1)` - explain the statement.

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The length of a zinc rod, when heated from 20^(@)C " to " 80^(@)C , increase by 0.6 cm. If the coefficient of linear expansion of zinc is 27 times 10^(-6@)C^(-1) , what is the initial length of the rod?

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