Explanation:
Given that,
Initial temperature
Final temperature
Length = 34.0 m
We know that,
Coefficient of linear expansion of Invar is
Coefficient of linear expansion of steel is
We need to calculate the temperature difference is
We need to calculate the change in length of Invar
Using formula of change in length
Put the value into the formula
We need to calculate the change in length of steel
Difference in length of two 34.0 m
Long surveyor's tapes is
Put the value into the formula
The difference in length is 18.12 mm.
Hence, This is the required solution.