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A thin brass sheet at 10^(@)C and a thin...

A thin brass sheet at `10^(@)C` and a thin steel sheet at `20^(@)C` have the same surface area. The common temperature at which both would have the same area is (Coefficient of linear expansion for brass and steel are respectively, `19 xx 10^(-6//@)C` are `11 xx 10^(-6//@)C)`

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A thin brass sheet at 20^(@)C and a thin steel sheet at 30^(@)C have the same surface area. The common tempreture at which both would have the same area is (Coefficient of linear expansion for brass and steel are respectively, 19xx10^(-6)//^(@)C are 11xx10^(-6)//^(@)C )

A thin brass sheet at 10^(@)C and a thin stell sheet at 20^(@)C have the same surface area. The common temperature at which both would have the same area is (coefficient of liner expansion for brass and steel are respectively 19xx10^(-6//@)C and 11xx10^(-6//@)C) .

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).

A steel scale is correct at 0^(@)C . The length of a brass tube measured by it at 40^(@)C is 4.5 m. The correct length of the tube at 0^(@)C is (Coefficients of linear expansion of steel and brass are 11xx10^(-6)//""^(@)Cand19xx10^(-6)//""^(@)C respectively.)

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.)

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.)

(A) : Steel rods are used in R.C.C. ( R) : Both steel and R.C.C. have almost same values of coefficient of linear expansion.

(A) : Steel rods are used in R.C.C. ( R) : Both steel and R.C.C. have almost same values of coefficient of linear expansion.

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: