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?

 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

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

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