Author Question: Why do bridges have expansion joints? a. They would buckle and crack otherwise. b. to let water ... (Read 34 times)

student77 · **on:** Jul 28, 2018

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