Two uniform metal rods of length l1 and l2
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Two uniform metal rods of length L1, and L2, and their linear coefficients of expansion alpha1 , and alpha 2.
respectively, are connected to form a single rod of length (L1, + L2.). When the temperature of the combinedrod is raised by "t°C", the length of each rod increased by the same amount thenalpha2/alpha1 + alpha2