Question

b. (use linear expansion by lyamda formula )A bridge is made from 20 m long iron<br />rods. At temperature 18 °C, the distance<br />between two rods is 0.4 cm. Up to what<br />temperature will the bridge be in good<br />shape?​

Answer 1

Answer:=35.4°C

Explanation: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

=11.5*10^-6*(T-16)

T=18+

=35.4°C