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प्रश्न
State one application of thermal expansion of liquids.
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उत्तर
APPLICATION OF THERMAL EXPANSION OF LIQUIDS: An important application is mercury thermometer or alcohol thermometer.
When the bulb of the thermometer is kept in contact with a hot body the mercury expands and the level of mercury rises in the capillary tube.
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संबंधित प्रश्न
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 iron washer is heated. State the effect on its external.
At what temperature the pure water has (a) maximum density (b) minimum volume?
Give reasons for the following:
In cold countries, water pipes burst in winter.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
Thermal expansion is always a nuisance.
Explain thermal expansion with suitable examples.
- Assertion: Gas is highly compressible than solid and liquid
- Reason: Interatomic or intermolecular distance in the gas is comparably high.
Analogy:
Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
