A steel railroad track has a length of 31 m

Physics

1 answer:

Bess [88]4 years ago

7 0

Answer:

DL = 0.0105 [m] = 10.57 [mm]

Explanation:

To solve this problem, we use the following equation that involves length changes depending on temperature changes.

$DL=\alpha *DT*L$

where:

DL = length change

α = thermal expansion coefficient = 11 * 10^(-6) [1/°C]

DT = temperature change = (37-6) = 31 [°C]

L = nominal or initial length = 31 [m]

DL = 11 * 10^(-6) * 31 * 31

DL = 0.0105 [m] = 10.57 [mm]

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