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प्रश्न
The gaps are left between the successive rails on a railway track.
उत्तर
In summer due to considerable rise in temperature, the gaps allow for the expansion of rails, otherwise the rail will bend sideways.
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संबंधित प्रश्न
Gases expand .......... than the liquids.
Alcohol expands ........... than water.
The correct statement is
Distinguish between liquid and vapour (or gas) states of matter on the basis of the following factors
- Arrangement of molecules
- Inter-molecular separation
- Inter-molecular force, and
- Kinetic energy of molecules
Why does bubbles appear when a liquid is heated?
Describe an experiment to demonstrate the thermal expansion in solids.
A cement floor is laid in small pieces with gaps in between.
Which of the following will expand more, when heated to the same temperature : (a) solid (b) liquid and (c) gas?
How does the density of a substance (solid, liquid and gas) change on heating?
The radius of a metal sphere at room temperature T is R and the coefficient of linear expansion of the metal is α. The sphere is heated a little by a temperature ΔT so that its new temperature is T + ΔT. The increase in the volume of the sphere is approximate.
