Question

Calculate the initial length of a copper rod whose initial temperature is 103°f and final temperature as 94°c .given the final length as 17.21m and linear expasivity=0.000017/k

Answer 1

$$l=l_0(1+\alpha\Delta T)\\17.21=l_0(1-(103-94)(0.000017))\\l_0=17.2126\ m$$