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प्रश्न
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
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उत्तर
In summer when the temperature increases considerably the bridge made of metal expands and rollers slide to allow for expansion otherwise the bridge may break the pillar.
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संबंधित प्रश्न
A cubical metal solid block is heated. How will its volume change?
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. Explain the reason.
An iron washer is heated. State the effect on its external.
An iron washer is heated. State the effect on its internal diameter.
Give reason for the following
An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.
If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.
- Assertion: Gas is highly compressible than solid and liquid
- Reason: Interatomic or intermolecular distance in the gas is comparably high.
The expansion in volume is called linear expansion.
Analogy:
Expansion is length:: Linear expansion.
Expansion in volume:: ______.
