Advertisements
Advertisements
प्रश्न
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
Advertisements
उत्तर
A weather cock is an instrument which is used to indicate the direction in which air is moving. It consists of an arrow, mounted at its centre of gravity so it can move freely about a vertical axis.
APPEARS IN
संबंधित प्रश्न
Name two air pollutants which affect our health.
Write ‘true’ or ‘false for the following;
Air is a compound.
Give a brief account of the discovery of air and the scientists involved.
Name the following.
Gases that are harmful to the ozone layer
______ soil has pH 7.
What will happen if the amount of water vapour in the air increases.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
What should be done if the clothes of a person catch fire accidentally? Why?
The process of conversion of iron into hydrated form of oxides is called _______.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
