Physics
posted by Ben .
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 105 per C.

Physics 
Jennifer
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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