Question

Expanaion on heating can be a nuisance .explain giving two examples

Answer 1

Examples of nuisance of thermal expansion:1)Due to high temperature in hot summer, the railway rails may expandand change thier shape to irregular shape. This may cause derailmentof trains which travel on the track. This can be prevented by leavingsmall space between successive rails.
2)Due to high temperature in hot summer, cement floors or walls may give cracks. This can be prevented by leaving small gaps betweendifferent sections of the floor