Advertisements
Advertisements
प्रश्न
Describe one experiment to show that liquids expand on heating.
Advertisements
उत्तर
(i) Take an empty bottle with a tight-fitting cork having a hole drilled in its middle, a drinking straw, two bricks, a wire guaze and a burner.
(ii) Fill the bottle completely with water and add a few drops of ink in it to make it colored.
(iii) Fix the cork in the mouth of the bottle and pass the drinking straw through the cork. Put some molten wax around the hole so as to avoid the leakage of water.
(iv) Pour some more water into the drinking straw so that water level in the straw can be seen. Mark the water level in the straw as shown in the following figure.
Thermal expansion of a liquid
(v) Place the bottle on the wire gauze kept over the two bricks as shown in the following figure. Then heat the bottle by means of a burner.
(vi) Look at the level of water in the straw.
You will notice that as the water is heated more and more, the level of water in the drinking straw rises. This shows that water expands on heating.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
Equal volumes of different liquids expand by different amounts when they are heated to the same rise in temperature.
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
We use a ________ for measuring the temperature of a body.
Fill in the blank
Gases expand _______ than the liquids.
What do you understand by thermal expansion of a substance ?
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
Name a solid which is a good conductor of heat.
Why are quilts filled with fluffy cotton?
In ice cubes, the force of attraction between the water molecules is ______.
When we heat them the force of attraction between the molecules decreases and the ice cubes become ______.
