Question

A bridge is made from 20 m long iron rods. At temperature 18°C the between two rods is 0.4 cm. Up to what temperature will the bridge be in good shape?

Answer 1

Given information

Length of iron rod is =20 m

                                  =2000 cm at 20 degrees

Distance between length of two rods is=0.4 cm

Then the temp coefficient of linear expansion of iron is =11.5*10^-6

Finally formula for linear expansion of solids is

Δl$\frac{delta l}{l}=[tex]\frac{alpha}{delta T}$

$\frac{0.4}{2000}$=11.5*10^-6*(T-16)

T=18+$\frac{0.4}{11.6*10^-6}$

=35.4°C

Answer 2

Answer:

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