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प्रश्न
What do you understand by thermal expansion of a substance?
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उत्तर
The expansion of a substance on heating is called the thermal expansion of the substance.
संबंधित प्रश्न
The increase in length of a metal rod depends on
State three factors on which depend the linear expansion of a metal rod on heating.
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
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?
Describe an experiment to show that same volume of different liquids heated to same rise in temperature expand by different amounts.
What are the different types of thermal expansions?
Distinguish between a clinical and a laboratory thermometer.
Define the following term:
Coefficient of superficial expansion
Give reasons for the following:
Telephone wires sag in summer.
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.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
Borosilicate glass do not expand much on being heated.
Analogy:
Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
