Advertisements
Advertisements
प्रश्न
Explain the following observations very briefly
A firki does not rotate in a closed area.
Advertisements
उत्तर
A firki rotates due to the air movement present in the surrounding and a closed area doesn’t support air movement. Hence, a firki will rotate only when placed in an open area due to the presence of moving air all around.
APPEARS IN
संबंधित प्रश्न
Give two uses of the following component present in air:
water vapour
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
State two similarities and two differences between respiration and burning.
Write ‘true’ or ‘false for the following;
Air is a compound.
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
While freezing, the ______ of water is lowered.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
How is light scattered by the air?
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
The layer of air around the earth is known as ______.
