Need physics help with a steel ring with a hole

Anonymous
timer Asked: Nov 15th, 2015
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A steel ring with a hole having area of 8.970 cm2 is to be placed on an aluminum rod with cross-sectional area of 9.000 cm2. Both rod and ring are initially at a temperature of 22.0°C. At what common temperature can the steel ring be slipped onto one end of the aluminum rod? (The coefficient of linear expansion of steel is11 ✕ 10−6 (°C)−1, and the coefficient of linear expansion of aluminum is24 ✕ 10−6 (°C)−1.)

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