Question

Calculate the change in length of a concrete sidewalk (Coefficient of linear expansion for concrete is 12 * 10-6 / oC) that is 50 meters that undergoes a temperature change of 25 oC. 0.15 0.015 0.00015

Answer 1

The correct answer is 0.015 meters.

Step-by-step explanation:

We know that the change in length of a material on account of temperature change is given by

`\Delta L=L_(o)\alpha \Delta T`

where

`L_(o)` is the initial Length

`\alpha` is the coefficient of linear thermal expansion

`\Delta T` is the change in temperature.

Applying values we get

`\Delta L=50* 12* 10^(-6) * 25\\\\\therefore \Delta L=0.015meters`