At 40∘C, a brass rod has a length 50 cm and a diameter 3.0 mm. It is joined to a steel rod of the same length and diameter at the same temperature. What is the change in the length of the composite rod when it is heated to 240∘C? The coefficients of linear expansion of brass and steel are 2.0×10−5 ∘C−1 and 1.2×10−5 ∘C−1 respectively.

At 40∘C, a brass rod has a length 50 cm and a diameter 3.0 mm. It i

1.	At 40∘C, a brass rod has a length 50 cm and a diameter 3.0 mm. It is joined to a steel rod of the same length and diameter at the same temperature. What is the change in the length of the composite rod when it is heated to 240∘C? The coefficients of linear expansion of brass and steel are 2.0×10−5 ∘C−1 and 1.2×10−5 ∘C−1 respectively.
Answer» At $40^{\circ} C$ , a brass rod has a length 50 cm and a diameter 3.0 mm. It is joined to a steel rod of the same length and diameter at the same temperature. What is the change in the length of the composite rod when it is heated to $240^{\circ} C$ ? The coefficients of linear expansion of brass and steel are $2.0 \times 10^{- 5}^{\circ} C^{- 1}$ and $1.2 \times 10^{- 5}^{\circ} C^{- 1}$ respectively.

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