Advertisements
Advertisements
प्रश्न
Describe an experiment to showthat air expands on heating.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
A longer rod expands ........... than a shorter rod on being heated to the same temperature.
State three factors on which depend the linear expansion of a metal rod on heating.
Give scientific reason.
An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
At what temperature the pure water has (a) maximum density (b) minimum volume?
Define the following term:
Coefficient of superficial expansion
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
Give reason for the following
An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.
What is thermal expansion?
