A brass scale is correct at `20^@C ` . The length of a rod measured by it at `35^@C` is 60 cm . What is the correct length of rod at that temperature ? (`alpha` of brass = `18.9 xx 10^(-6) per^@C)` .

A steel rod when measured with a zinc scale (alpha = 26 xx 10^(-6)//^@C) appears to be 1 m long when both rods are at 20^@C . If the zinc scale was graduated at 0^@C , what is the true length of the steel rod at 0^@C ? alpha for steel = 12 xx 10^(-6)//^@C .

Define co-efficient of linear and cubical expansion and establish a relation between them . The length of a copper wire is measured 40 cm by a metal scale when both are at the temperature of 25^@C . What would be the length of wire measured by the same scale when both are at 55^@C ? (alpha "for metal" = 1.1 xx 10^(-7) @C^(-1) and alpha for copper = 1.7 xx 10^(-7)@c^(-1))

A metal scale is graduated at 0^@C . What would be the true length of an object which when measured with this scale at 25^@C , reads 50 cm? alpha for metal = 18 xx 10^(-6)//^@C .

What should be the length of steel abd copper rods at 0^@C so that the difference in their lengths is 5.0 cm at all temperatures. Coefficient of linear expansion of copper is 1.7 xx 10^(-5) //^@ C and that of steel is 1.1 xx 10^(-5) //^@ C .

The resistance of a metallic conductor is 2Omega at 30^@C . Calculate its resistance at a temperature of 130^@C . (Given alpha = 4 xx 10^-3 k^-1)

100 c.c of air are measured at 20^@C .If the temperature be raised to 50^@C , what will be the volume, pressure remaining constant.

A steel tyre is 1 m in diameter at 10^@C . To what temperature it must be raised so that it may just slip on a wheel 1.005 m in diameter ? alpha for steel = 12 xx 10^(-6)//^@C .

The resistance of a metallic wire is 10Omega at 9^@C . Calculate its resistance at a temperature of 100^@C . Gien a = 3.9 xx 10^-3 K^-1