Question

By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24°C to -16°C? The coefficient of linear thermal expansion for this concrete is 1.0 × 10-5 C-1.

Answer 1

Step-by-step explanation:

According to Thermal Expansion of solids:

`dl = \alpha * l * dt`

`dl = {10}^( - 5) * 18 * 40`

`dl = 7.2 * {10}^( - 3)`