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A steel scale is correct at 0^(@)C. The ...

A steel scale is correct at `0^(@)C`. The length of a brass tube measured by it at `40^(@)C` is `4.5m`. The correct length of the tube at `0^(@)C` is (Coefficients of linear expansion of steel and brass are `11 xx 10^(-6//@)C` and `19 xx 10^(-6//@)C` respectively).

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`99.98cm`
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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 coefficient of liear expansion of brass and steel are 2.0xx10^(-5).^(@)C^(-1) and 1.2xx10^(-5).^(@)C^(-1) respectively:

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What should be the sum of lengths of an aluminium and steel rod at 0^(@)C is, so that all the temperature their difference in length is 0.25m . (Take coefficient of linear expansion for aluminium and steel at 0^(@)C as 22 xx 10^(-6)//.^(@)C and 11 xx 10^(-5)//.^(@)C respectively.)

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