cold air barrier

The Ocean of Air - As we know that we cannot live without air even for a single minute. We live in a vast ocean of air, which extends upwards for over 1000 km. Apart from providing us air to breathe, this blanket of air traps the sun's heat that is ..

As we know that we cannot live without air even for a single minute. We live in a vast ocean of air, which extends upwards for over 1000 km. Apart from providing us air to breathe, this blanket of air traps the sun's heat that is essential for life on t..

The Ocean of Air - As we know that we cannot live without air even for a single minute. We live in a vast ocean of air, which extends upwards for over 1000 km. Apart from providing us air to breathe, this blanket of air traps the sun's heat that is ..

>Oxygen is present 21% by volume in air. It supports life and combustion. It is added to air by photosynthesis and removed from air by respiration and combustion. Nitrogen is present 78% by volume in air. It is present in proteins, which are essential for lif..

Ordinary air seems to be dry. It does not cause wetness on our body or clothes. However, you may have some idea about the huge quantity of rain, snow, dew, etc. that gets formed in a year throughout the world. All of it comes only from the air. Thus, the apparent dryness of ..

Breathe gently on to a cold surface. Minute droplets of water can be observed. This shows that expired air has more water vapour than the inspired air. Thus, water is lost during respiratio..

It is the isolation in space of the two populations of the same species, due to geographical barriers such as the sea, deserts, mountains and rivers, for land plants and animals. Geographical isolation plays an important role in 'allopatric speciation'. Allopatric species are the related..

The chief source of free nitrogen is atmospheric air and nitrogen is usually prepared from it. Air free from dust, water vapour and carbon dioxide is compressed in a compression chamber for liquefaction. Firstly, the pressure on the air is increased to about 200 atmosp..

In order to live and enable ourselves to do everyday work we need energy. The prosperity of a country depends upon the availability of energy. Huge amount of electrical energy is used to run the air conditioners, cold storage and other domestic appliances. A large share of..

Gaseous Exchange in the Alveolus of Man The capillaries lining the alveoli have impure blood which has low concentration of oxygen. So, the oxygen from the air easily diffuses into the blood through the thin barrier of the alveolus wall. Similarly since the concentration of..