54. A metal rod is 64.522 cm long at 12 °C and 64.576 cm at 90 °C. Find the coefficient of linear expansion of its material. a. 1.073 x 10-5/°C b. 1.073 x 10-6 /°C c.1.073 x 10-7 1°C d.1.073 x 10-8 1°C a O b C d
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