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प्रश्न
What do you understand by thermal expansion of a substance?
उत्तर
The expansion of a substance on heating is called the thermal expansion of the substance.
संबंधित प्रश्न
Two iron rods – one 10 m long and the other 5 m long, are heated to the same rise in temperature. Which will expand more?
Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?
Iron rims are heated before they are fixed on the wooden wheels.
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
Describe an experiment to showthat air expands on heating.
Water is heated from 0°C to 4°C. Will it expand?
An iron washer is heated. State the effect on its mass.
An iron washer is heated State the effect on its density.
An iron washer is heated. State the effect on its external.
Give scientific reason.
An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
What is the velocity of thermal radiations?
What is meant by thermal 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.
Complete the following sentence:
When ice melts its volume ______ and density _______.
Solids ______ on heating and ______ on cooling.
Borosilicate glass do not expand much on being heated.
- Assertion: Gas is highly compressible than solid and liquid
- Reason: Interatomic or intermolecular distance in the gas is comparably high.
Analogy:
Expansion is length:: Linear expansion.
Expansion in volume:: ______.
What type of glassware is used in laboratories? Why?
