# Physics

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Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.

• Physics -

The liear expansion coefficient for steel in that temperature range is ab9out 12*10^-6 per degree C change.

Solve this equation for L:

(delta L) = 0.52 m = L*(alpha)*(delta T)

where delta T = 30 - 2 = 28 C

L = 0.52 m/{28 * 12*10^-6)

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