At `40^(@)C` a brass wire of 1mm radius is hung from the ceiling. A small mass, M is hung from the free end of the wire. When the wire is cooled down from` 40^(@)C` to `20^(@)C` it regains its original length of 0.2 m the value of M is close to (coefficient of linear expansion and young's modulus of brass are `10^(-5)//.^(@)C` and `10^(11)//N//m^(2)` respectively `g=10ms^(-2))`

Steel wire of length 'L' at 40^@C is suspended from the ceiling and then a mass 'm' is hung from its free end. The wire is cooled down from 40^@C to 30^@C to regain its original length 'L'. The coefficient of linear thermal expansion of the steel is 10^-5//^@C , Young's modulus of steel is 10^11 N//m^2 and radius of the wire is 1mm. Assume that L gt gt diameter of the wire. Then the value of 'm' in kg is nearly

Steel wire of length 'L' at 40^@C is suspended from the ceiling and then a mass 'm' is hung from its free end. The wire is cooled down from 40^@C to 30^@C to regain its original length 'L'. The coefficient of linear thermal expansion of the steel is 10^-5//^@C , Young's modulus of steel is 10^11 N//m^2 and radius of the wire is 1mm. Assume that L gt gt diameter of the wire. Then the value of 'm' in kg is nearly

Steel wire of length 'L' at 40^@C is suspended from the ceiling and then a mass 'm' is hung from its free end. The wire is cooled down from 40^@C to 30^@C to regain its original length 'L'. The coefficient of linear thermal expansion of the steel is 10^-5//^@C , Young's modulus of steel is 10^11 N//m^2 and radius of the wire is 1mm. Assume that L gt gt diameter of the wire. Then the value of 'm' in kg is nearly

Steel wire of length 'L' at 40^@C is suspended from the ceiling and then a mass 'm' is hung from its free end. The wire is cooled down from 40^@C to 30^@C to regain its original length 'L'. The coefficient of linear thermal expansion of the steel is 10^-5//^@C , Young's modulus of steel is 10^11 N//m^2 and radius of the wire is 1mm. Assume that L gt gt diametere of the wire. Then the value of 'm' in kg is nearly

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).