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प्रश्न
What is thermal expansion?
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उत्तर
The expansion of a substance on heating is called thermal expansion.
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संबंधित प्रश्न
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.
Water is heated from 0°C to 4°C. Will it expand?
Define the following term:
Coefficient of cubical expansion
The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.
(i) Why does the temperature along BC remain constant?
(ii) When is the volume of water minimum?
(iii) At what temperature does water have maximum density? Explain.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
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.
Analogy:
Expansion is length:: Linear expansion.
Expansion in volume:: ______.
When we cool the liquid it will become ______.
