An Aluminum Rod Is 20

question 3

Multiple Choice

An aluminum rod is 20.0 cm in length, has a diameter of 10.0 mm and is at a temperature of 20°C. The coefficient of linear expansion of aluminum is 23.0 × 10⁻⁶/°C. If the temperature changes to 50°C, then the increase in diameter of the aluminum rod is

• A) 4.0 × 10⁻³ mm.
• B) 4.9 × 10⁻³ mm.
• C) 5.6 × 10⁻³ mm.
• D) 6.0 × 10⁻³ mm.
• E) 6.9 × 10⁻³ mm.

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