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प्रश्न
Describe an experiment to showthat air expands on heating.
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उत्तर
Take a glass fL bottomed flask. Close its mouth with a cork having capillary tube containing an indicator visible in the tube as shown. Make it airtight. Place the flask in hot water. After a few minutes, we see the indicator moving up. This happens because the air inside the flask expands with rise in temperature. This proves that gases expand on heating.
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संबंधित प्रश्न
State three factors on which depend the linear expansion of a metal rod on heating.
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?
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.
At what temperature the pure water has (a) maximum density (b) minimum volume?
What is the velocity of thermal radiations?
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.
What difference do you think heating the solid will make in their molecules?
Explain thermal expansion with suitable examples.
When the vibrations move from one molecule to another molecule heat will flow.
