Answer to Question #277376 in Physics for Tabassum

Question #277376

How much will a 1-km steel bridge expand due to a 10 K temperature change?

1.2 m

12 cm

12 m

6 cm

Expert's answer

We can find the increase in the length of a steel bridge as follows:

\Delta L = \alpha L\Delta T,

\Delta L = 12\times10^{-6}\ K^{-1}\times1000\ m\times10\ K=0.12\ m=12\ cm.

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