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A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 16°C when it was installed. What is its change in length when the temperature drops to a frigid -39°C?

  • Physics - ,

    The pipe shortens. That is a -55 C temperature change.

    length change =
    L*alpha*(delta T)
    -(65 m)*(thermal expansion coefficient of steel)* (55 C)

    Look up the thermal expansion coefficient of steel for that temperature range. It is about 12*10^-6 per degree C

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