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 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)

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 4.5 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.)

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).

Two thin metal strips, one of brass and the other of iron are fastended together parallel to each other. Thickness of each strip is 2 mm . If the strips are of equal length at 0^(@)C . The radius of the are formed by the bimetaalic strip when heated to 80^(@)C is (Coefficient of linear expansion of brass =19xx10^(-6)//^(@)C & of iron= 12xx10^(-6)//^(@)C) .

Two thin metal strips, one of brass and the other of iron are fastened together parallel to each other. Thickness of each strip is 1 mm. If the strips are of equal length at 0^(@)C . The radius of the are formed by the bimetallic strip when heated to 80^(@)C is (Coefficient of linear expansion of brass = 19xx10^(-6)//""^(@)C & of iron = 12xx10^(-6)//""^(@)C ).

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 wire AB of length 85cm at 10^(@)C is fixed rigidly at points A and B in an aluminium frame as shown. If the temperature of the system is raised to 110^(@)C , what extra stress will be produced in the wire relative to aluminium frame. Assume that coefficient of linear expansion for aluminium and steel are 23xx10^(-6)//^(@)C and 11xx10^(-6)//^(@)C respectively and Young's moduls for steel is 2xx10^(11) pa.