Question

. Explain why rails have gaps at specific distances.

. Explain with the help of formulae the expansion coefficients of liquid and gas.

PLEASE HELP ME​

Answer 1

Answer:

1. because of two trains can collide if there is no gaps between aid at specific distance

Answer 2

Answer:

1. As rails are made up of steel, these also expand in summers and contract in winters. These expansion and contraction can cause sagging and bending of rails which could derail the trains running on them. Thus, the rails have been provided with gaps at specific distance so as to prevent this bending of rails.