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 ).

An iron sphere has a radius of 10 cm at 0°C. The change in volume of the sphere if it is heated to 100^(@)C (coefficient of linear expansion of iron = 11 xx 10^(-6)^(@) C^(-1) ) is

Two equal, straight strips of two different metals are fastened together parallel to each other, a small fired distance d apart to form a bimetallic strip. Find the radius of curvature of the bimetallic strip when it is heated from 0^(@)C" to "t^(@)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.)

Two identical thin metal strips one of aluminium and the other of iron are riveted together to form a bimetallic strip. The temperature is raised by 50^(@)C . If the central planes of the two strips are separated by 2nm and the coefficients of thermal expansion of aluminium and iron are respectively 30 xx 10^(-6)//^(@)C and 10 xx 10^(-6)//^(@)C the average radius of curvature of the bimetallic strip is about

Two identical thin metal strips one of aluminium and the other of iron are riveted together to form a bimetallic strip. The temperature is raised by 50^(@)C . If the central planes of the two strips are separated by 2nm and the coefficients of thermal expansion of aluminium and iron are respectively 30 xx 10^(-6)//^(@)C and 10 xx 10^(-6)//^(@)C the average radius of curvature of the bimetallic strip is about