At (20^{circ} mathrm{C}), the hole in an aluminum ring is (2.500 mathrm{~cm}) in diameter. You need to

Question:

At $20^{\circ} \mathrm{C}$, the hole in an aluminum ring is $2.500 \mathrm{~cm}$ in diameter. You need to slip this ring over a steel shaft that has a room-temperature diameter of $2.506 \mathrm{~cm}$. To what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft?

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