Question

Fused quartz possesses an exceptionally low coefficient of linear expansion, 5.50 × 10-7 (C°)–1. Imagine you had a bar of fused quartz of length 3.49 m at 20.0°C. By how much, in millimeters, would the bar expand if you heated it to 213°C?

Answer 1

Answer:

 ΔL = 3.704 10⁻⁴ mm

Explanation:

The body when heated increases the distance between its atoms, which results in a linear expansion of the bodies, which is described in the first approximation by the expression

      ΔL = α L Δt

Where alf is the linear expansion coefficient, L the initial length, Dt the temperature variation and DL the length variation

      ΔL = 5.50 10⁻⁷ 3.49 (213 - 20)  

      ΔL = 3.704 10⁻⁴ mm