Why do bridges have expansion joints? a. They would buckle and ...

[student77]

Why do bridges have expansion joints?
 a. They would buckle and crack otherwise.
  b. to let water run off
  c. to absorb vibrations due to traffic
  d. for ease in construction

Question 2

The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 10  10-6/C. On a cold day when the temperature is 10C the Eiffel tower is 300 meters tall. Its height on a hot day when the temperature is 40C is
 a. 300.0015 m
  b. 300.015 m
  c. 300.15 m
  d. 301.5 m
  e. 315 m

[nanny]

Answer to Question 1

A

Answer to Question 2

C

[student77]

Wow, this really help

[shewald78]

Thanks for the timely response, appreciate it