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

Answer:

The correct answer is 0.015 meters.

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

$\Delta L=50\times 12\times 10^{-6} \times 25\\\\\therefore \Delta L=0.015meters$