Railway lines are laid with gaps to allow for expansion. If each line is 10 m long at `20^@C`, what should be the length of the gap to be kept between two rails to allow for expansion if the maximum temperature that can be reached is `50^@C`?
`(alpha_(steel)=1.2 xx 10^-6//^@C)`

Railway lines are laid with the gaps to allow for expansion. The gap between two lines is 0.5 cm at 10 °C. If the length of a line is 12 m then temperature at which the lines just touch each other is [alpha = 11 x 1O'6/ °C]

Railway tracks are laid with gaps for expansion. The gap between the steel rails 20 m long is 1.2 cm at 10^@C . The temperature at which the steel rails just touch each other is ( prop steel = 12 xx 10^-6//^@C)

The difference between the lengths of steel rod and a brass rod is 0.6 at all temperatures. What are their lengths at 0^@C ? (alpha_Steel = 12 xx 10^-6//^@C , (alpha_(brass)= 18 xx 10^-6//^@C )

A steel tyre of 1.2 m inner diameter at 20^@C is to be fitted on a cartwheel of 120.33 cm diameter of the tyre. Calculate the temperature to which the steel tyre is to be raised so that it will just slip on the wheel. (alpha_(Steel) = 11 xx 10^-6//^@C)

A disc has an area of 0.32 m^2 at 20^@C , what will be its area at 100^@C ? [alpha = 2 xx 10^-6/ @C]

A steel tyre is 100 cm in diameter at 25^@C . To what temperature must it be heated so that it will just slip on a cartwheel 100.3 cm in diameter? (alpha_(steel)=1.2 xx 10^-5//^@C )

Length of a metal rod at temperature 27^@ C is 4.256m. Find the temperature at which the length of the same rod increases to 4.268m. ( alpha for iron = 1.2 xx 10^(-5) K^(-1) )

A metal sphere 10.01 cm in diameter is placed on a brass ring of internal diameter 10 cm and at the same temperature of 10^@C . The temperature up to which they should be heated together so that the metal sphere just passes through the ring is [alpha_(me ta l)= 12 xx 10^-6/@C and alpha_brass= 18 xx 10^-6/@C]