Question

The coefficient of thermal expansion of an aluminium rod is ​23 × ${10}^{-6}$$°C^{-1}$. If so, the coefficient of thermal expansion ​of a spherical aluminium ball will be: ​

• A. 69 × ${10}^{-6}$$°C^{-1}$
• B. 23 × ${10}^{-6}$$°C^{-1}$
• C. 7.6 × ${10}^{-5}$$°C^{-1}$
• D. 46 × ${10}^{-6}$$°C^{-1}$

Answer 1

The correct option is A 69 × ${10}^{-6}$$°C^{-1}$

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