Advertisements
Advertisements
प्रश्न
Describe an experiment to show that air expands on heating.
Advertisements
उत्तर
(i) Take an empty bottle. Actually the empty bottle contains air. Attach a rubber balloon to its neck as shown in the following figure. Initially, the balloon is deflated.
(ii) Place the bottle in a water bath containing boiling water. After some time you will notice that the balloon gets inflated as shown in the following figure. The reason is that the air inside the bottle expands on heating and it fills the balloon.
Thermal expansion of air
(iii) Take the bottle out of the water bath and 7 allow it to cool by itself. We will notice that the balloon gets deflated and it collapses. This is because the air inside the balloon and the bottle have contracted on cooling. The air from the balloon passes to the bottle, so the balloon gets deflated.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
A mercury thermometer makes use of the property of the expansion of liquids on heating.
Fill in the blank
On heating a body, its temperature _______.
Select the correct alternative
The temperature of pure melting ice is
Select the correct alternative
Which of the statement is correct
Name two substances which expand on heating.
Why are gaps left between successive rails on a railway track ?
Explain why the water pipes are covered with cotton during very cold weather.
The bottom of a cooking utensil is painted black. Give the reason.
______ is the only matter on the Earth that can be found naturally in all three states.
Match the following
| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
