Advertisements
Advertisements
प्रश्न
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 the water. Explain the reason.
Advertisements
उत्तर
When the bottle is heated, bubbles of air are seen escaping into the water. This happens because the air present in the glass bottle expands on heating and tries to escape out through the tube into the water.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
Kerosene contracts on heating.
The fig. shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.
Why are gaps left between successive rails on a railway track ?
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Why is a cement floor laid in small pieces with gaps in between?
State one application of thermal expansion of liquids.
Why is an oven made of double walls with the space in between filled with cork ?
Explain why the water pipes are covered with cotton during very cold weather.
What are the effects of heat?
______ is greater for liquids than solids and it is maximum in gases.
