Question

The newly constructed bridge in your town is a steel arch bridge 600m in length. How much does the total length of the roadway decking change between temperature extremes of 30⁰C and 50⁰C?

Answer 1

$\frac{ΔL}{L_0} = αΔT \\ ΔL = αL_0ΔT \\ ΔL = 11 \times 10^{-6} \times 600 (50 -30) \\ = 0.132 \;m \\ = 13.2 \;cm$