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**1. Knowing that a 0.5 mm gap exists when the temperature is 20 degree celsius,**

Determine the tempature at which the normal stress in the aluminum bar will be equal to -90 MPa,And the corresponding exact length of the aluminum bar.

Determine the tempature at which the normal stress in the aluminum bar will be equal to -90 MPa,And the corresponding exact length of the aluminum bar.

## The Attempt at a Solution

I am not familiar with this topic. Could anyone also show me some of their thing process . Thanks in advance.