Question

The diameter of the round copper bar is 20.06 mm. A copper ring with a hole diameter of 20.01 mm is to be attached to the rod. How much of the tire needs to be heated to insert the rod into the tire?

Answer 1

$$d_0(1+\alpha\Delta T)=D$$

$$20.01(1+(17\cdot 10^{-6})\Delta T)=20.06$$

$$\Delta T=147\degree C$$