The Coefficient of Linear Expansion of Steel Is 12 ×

question 64

Multiple Choice

The coefficient of linear expansion of steel is 12 × 10^-6/C°. A railroad track is made of individual rails of steel 1.0 km in length. By what length would these rails change between a cold day when the temperature is -10 °C and a hot day at 30 °C?

• A)0.62 cm
• B)24 cm
• C)48 cm
• D)480 cm
• E)620 cm

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