Physics
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in a pillar?
Related Questions
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.
A metal plate is heated. State three factors on which the increase in its area will depend.
A cubical metal solid block is heated. How will its volume change?
Explain the following:
A cement floor is laid in small pieces with gaps in between.