L = Lo + Lo*(T-To)oC*u.
L = 73.8 + 73.8(-45.3-15.7)1.24*10^-5.
L = 73.8 + (-.0558) = 73.74 m.
A steel section of the Alaskan pipeline had a length of 73.8 m and a temperature of 15.7 °C when it was installed. What is its change in length when the temperature drops to a frigid -45.3 °C?
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