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23 Nov 2019
An aluminum rod is 10.0 cm long and a steelrod is80.0 cm long when both rods are at a temperatureof
15°C. Both rods have the same diameter.The rods arejoined end-to-end to form arod 90.0 cm long. The
coefficients of linear expansion of aluminumandsteel are 2.4 Ã 10-5K-1 and1.2 Ã 10-5K-1,respectively. The
temperature is raised to 90°C. Theincrease in thelength of the joined rod, in mm, is closestto:
A) 0.81
B) 0.99 C) 0.72 D) 0.90 E) 0.63
An aluminum rod is 10.0 cm long and a steelrod is80.0 cm long when both rods are at a temperatureof
15°C. Both rods have the same diameter.The rods arejoined end-to-end to form arod 90.0 cm long. The
coefficients of linear expansion of aluminumandsteel are 2.4 Ã 10-5K-1 and1.2 Ã 10-5K-1,respectively. The
temperature is raised to 90°C. Theincrease in thelength of the joined rod, in mm, is closestto:
A) 0.81
B) 0.99
B) 0.99
C) 0.72
D) 0.90
E) 0.63
26 Jun 2023
