At 20.0 C a steel ball ( = 1.10 10-5 C -1 ) has a diameter

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At 20.0 °C a steel ball (α = 1.10 × 10-5 °C-1) has a diameter of 0.900 0 cm, while the diameter of a hole in an aluminum plate (α = 2.20 × 10-5 °C-1) is 0.899 0 cm. At what temperature (the same for both) will the ball just pass through the hole?

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