Explain the need for gabs in railway lines in the terms of the kinetic molecular theory of matter
According to the kinetic molecular theory of matter, all particles in a substance are in constant motion, colliding with each other and the walls of their container. In the case of railway lines, the need for gaps between sections of rail can be explained by this theory.
When trains pass over a section of railway track, the wheels and rails can become heated due to the friction between them. As the temperature increases, the particles in the metal expand and move more rapidly, causing the metal to expand as well. If there were no gaps in the railway lines, this expansion could lead to the rails buckling or warping, potentially causing derailments or other safety issues.
By incorporating gaps in the railway lines, engineers allow for the expansion and contraction of the metal without causing damage to the track or compromising safety. These gaps provide the necessary flexibility for the railway lines to adjust to changes in temperature and prevent potential accidents.