In this post we will read about
- Breathing
- Blowing
- Cold and hot action of blowing
- Blowing on fire
life depends on Oxygen gas present in air. Oxygen plays an important role of releasing energy from the food inside the food body. This energy is used by our body for performing its various function the process after taking oxygen from the air and giving out carbon dioxide from the body is done by breathing.
Breathing :-
Process of inhalation and exhalation of air is called breathing. Breathing is a very slow process and it is difficult to notice the breathing of another person. The activity of breathing is performed by our nose and lungs. The process of breathing in is called in inhaling and the process of breathing outside is called exhaling. We breathe in, the year inter throughout our lungs and in flood the lungs. With this action our chest expands. When we breathe out the air comes out of our lungs. With this action Kama our chest contracts. Normally a person breathes for 12 -15 times in a minute. On running the breathing activity gets faster and a person breathes for about 60 times in a minute. One can easily notice such a fast breathing action of another person.
We we are also breathe sometimes with this action, the air is filled in the lungs to the their full capacity. The chest is also expended to its full capacity.
Blowing:-
Blowing is an action in which a person sends out a stream of air from mouth. In simple words, it refers to the fast exhaling of air. All of us make use of blowing action for different seasons. Putting off candle is one common example. Whistling sound is also made by a blowing action. Balloons are filled with air by blowing action. Children dry their paintings, with blowing action. Children also enjoy making bubbles of soap water, they do it with gentle blowing action. Parents after blow on the bruises of children because it gives some relief from the pain of bruises.
Cold And Hot Action of Blowing
May perform hot as well as cold action when we blow, air is exhaled out. Its temperature remains same whether we blow it on hot surface or cold surface. During winters, our skin gets colder. People often blow out on their hands in order to warm them/The hands become warm because air that we blow out is warmer than the cold surface.
On the other hand, people also blow to make the tea cold, It is because the tea is very hot. The air that we blow on it is colds than the hot tea. It makes the tea colder.
Blowing on fire
Blowing on fire brings different results. We blow on a burning candle to put it off. Blowing of candles is common scene at any birthday party. We also blow on burning wood to keep the fire going these are different reasons for this A candle burns at a particular temperature called ignition temperature. This ignition temperature lowers when we blow air on it. It puts off the candle. But we blow air on burning wood, we are pushing atmospheric air towards burning wood. This air contains oxygen which helps in burning. It keeps the fire going. In villages, ladies make use of a pipe to blow on fit for cooking.