The length of a beam increases by 1.26mm when its temperature is raised from 29.

Question

1. The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000025 /oC.

The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000025 /oC. The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000025 /oC.

Explanation / Answer

delta L / L = alpha * (delta T)

1.26/L=0.000025*(71.49-29.87)

L = 1210.96 mm= 1.211 m

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