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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
Iron rims are heated before they are fixed on the wooden wheels.
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.
Describe an experiment to show that same volume of different liquids heated to same rise in temperature expand by different amounts.
100 ml of each of the following liquid is heated from 10°C to 50°C. Which will expand more : (a) water (b) benzene (c) alcohol?
Water is heated from 0°C to 4°C. Will it expand?
An iron washer is heated State the effect on its density.
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
What is the velocity of thermal radiations?
What is meant by thermal expansion?
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:
In cold countries, water pipes burst in winter.
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.
How solids are expanded on heating?
When the vibrations move from one molecule to another molecule heat will flow.
