A Brass Rod Is 40

question 2

Multiple Choice

A brass rod is 40.1 cm long and an aluminum rod is 79.3 cm long when both rods are at an initial temperature of 0°C. The rods are placed in line with a gap of 0.60 cm between them, as shown in the figure. The distance between the far ends of the rods is maintained at 120.0 cm throughout. The temperature of both rods is raised until the two rods are barely in contact. The coefficients of linear expansion of brass and aluminum are 2.0 × 10^-5 K^-1 and 2.4 × 10^-5 K-¹, respectively. The temperature at which contact of the rods barely occurs is closest to

• A) 220°C.
• B) 210°C.
• C) 200°C.
• D) 230°C.
• E) 240°C.

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