A pedestrian bridge crosses a street. This bridge is entirely supported by columns from below. A gap at each end of the bridge separates the bridge's surface from the sidewalks leading to the bridge. The width of each gap changes with time. This width is smallest
A) on hot days.
B) at noon.
C) at midnight.
D) on cold day.

Question

Quizplus · Accepted Answer

The width of the gap is smallest on hot days because materials expand when heated, causing the bridge to expand and reduce the gap size.

A Pedestrian Bridge Crosses a Street