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प्रश्न
What is meant by thermal expansion?
उत्तर
The increase in size of a body on heating is called thermal expansion.
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संबंधित प्रश्न
Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature.
State three factors on which depend the linear expansion of a metal rod on heating.
One rod of copper and another identical rod of iron are heated to the same rise in temperature. Which rod will expand more? Give reason.
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.
At what temperature the pure water has (a) maximum density (b) minimum volume?
Define the following term:
Coefficient of superficial expansion
Give reasons for the following:
In cold countries, water pipes burst in winter.
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.
What type of glassware is used in laboratories? Why?
