and l2​ made of materials with the linear expansion coefficient α 1 ​and α2 ​

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Two rods having length l1 , and l2​ made of materials with the linear expansion coefficient α 1 ​and α2 ​, were soldered together. The equivalent coefficients of linear expansion for the obtained rod :
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Sep
Two rods having length l1 , and l2​ made of materials with the linear expansion coefficient α 1 ​and α2 ​, were soldered together. The equivalent coefficients of linear expansion for the obtained rod : and l2​ made of materials with the linear expansion coefficient α 1 ​and α2 ​ Two rods having length l1 [...]
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Tags: and l2​ made of materials with the linear expansion coefficient α 1 ​and α2 ​ , Two rods having length l1 , were soldered together. The equivalent coefficients of linear expansion for the obtained rod : ,