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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
Equal volumes of different liquids expand by a different amount when they are heated to the same rise in temperature.
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.
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.
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?
Give scientific reason.
The telephone wires which sag in summer become straight in winter.
What are the different types of thermal expansions?
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
- Assertion: Gas is highly compressible than solid and liquid
- Reason: Interatomic or intermolecular distance in the gas is comparably high.
