Physics
Explain the following:
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.
Related Questions
Explain the following:
A cement floor is laid in small pieces with gaps in between.
Explain the following:
Gaps are left between the successive rails on a railway track.
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in a pillar?
Explain the following:
Iron rims are heated before they are fixed on the wooden wheels.