Question

short definition of expansion and contraction of railway tracks by heat​

Answer 1

Answer:

When the air temperature reaches 30 degrees, the temperature on the rail can actually be up to 20 degrees higher. ... For some of our track, such high temperatures are more than our track is designed to cope with, however. The problem is that when steel rails get hot, they expand, which can cause a buckled rail.

Answer 2

Answer:

When the air temperature reaches 30 degrees, the temperature on the rail can actually be up to 20 degrees higher. ... For some of our track, such high temperatures are more than our track is designed to cope with, however. The problem is that when steel rails get hot, they expand, which can cause a buckled rail