Posted by **Ben** on Wednesday, January 9, 2013 at 2:19pm.

By what amount will a 178 m long concrete slab on the Mackinac Bridge contract when going from +39C to -35C? The linear expansion coefficient is 10-5 per C.

- Physics -
**Jennifer**, Thursday, January 10, 2013 at 7:46pm
deltaL = a*L*deltaT

where deltaL is the change in length, a s the linear expansion coefficient, L0 is it's initial length, deltaT is the final temperature

deltaL = 10^-5*178*(-35 - 39)

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