A polymer rod 583mm long expands by 170mm when its temperature is raised from 0°C to 148°C. What is the Coefficient of thermal expansion? Answer to 4 decimal places and only put in the numerical value. Do not write the unit in your answer.简答题

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A brass ruler is 300 mm long at 21 °C. It is heated to 100 °C and expands by 0.45 mm. Determine the coefficient of expansion for brass (in K-1). Give your answer to two significant figures in scientific notation. (i.e. 2.8E-6)

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