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\ufeffA steel wire $8$ \ufeffmetres long and $4$mm in diameter is fixed to two rigid supports. Calculate the increase in tension when the temperature falls $10\mathrm{\backslash \backslash }$deg C$.$ \ufeffThe coefficient of linear expansion of steel is $12$ \ufeffx$10-6\mathrm{\backslash \backslash }$deg C$-1.$ \ufeffThe young$’$s modulus for steel is $210$ \ufeffGPa.