The woodcutter replied, “It is too cold. My hands are frozen, so I blow on them to warm them up a little. Then, when they get cold again I warm them again by blowing.” You can warm your hands by blowing on them because your breath is hotter than your skin (particularly on a cold day). By blowing, you transfer energy from inside your body to your hands by convection. Moist air, like your breath, carries a lot of energy so it warms things more quickly than dry air.

2. There was a woodcutter. Everyday in the morning he used to go to
the forest to cut wood. In the evening he would sell the wood in the
city. One day he went deep into the forest.

3. It was a very cold winter. His fingers were becoming numb. Every
now and then, the woodcutter would put down his axe and bring his
hands close to his mouth. Then he would blow hard on them to
warm them. While he was cutting wood Mian Balishtiye was
watching him from a corner. Mian Balishtiye saw that the
woodcutter kept blowing on his hands.

4. He began to wonder what all that was about! But he could not
understand it. He got up thinking that he would go and ask the
woodcutter. After walking a little, he came back thinking that the
woodcutter may not like being asked. Finally, Mian Balishtiye could
not help himself. He went hopping to the woodcutter and said,
“Hello brother, if you don’t mind can I ask you something?”

5. BLOWING ON HIS HANDS:
Seeing this tiny person the woodcutter was amazed and amused. But,
he hid his smile and said, “Of course, of course, ask what you want
to.” “All I want to ask is why do you blow from your mouth on to
your hands?” said Mian Balishtiye.

6. The woodcutter replied, “It is too cold. My hands are frozen, so I
blow on them to warm them up a little. Then, when they get cold
again I warm them again by blowing.” You can warm your hands by
blowing on them because your breath is hotter than your skin
(particularly on a cold day). By blowing, you transfer energy from
inside your body to your hands by convection. Moist air, like your
breath, carries a lot of energy so it warms things more quickly than
dry air.

7. How does your breath help to warm your hands in winter?
By breathing deeply with full capacity of lungs, heat energy is
produced which helps the cold hands to become warm.

8. Mian Balishtiye nodded, “Oh, ho, so that’s it!” And with that he
moved off. But he stayed nearby and kept a close watch on him.
Soon it was afternoon. The woodcutter began to think of lunch. He
picked up two stones and made a chulha. He lit a fire and put a small
handi (pot) filled with potatoes to boil.

9. The wood was damp, so the woodcutter bent down and blew on the
fire to help it burn. Balishtiye was watching him from a distance.
“Arre”, he said to himself, “There he goes again – blowing from his
mouth! Does fire come out of his mouth?”

10. When we breathe out air it still contains a substantial amount of
oxygen (about 16 per cent). The exchange of oxygen and carbon
dioxide between the blood and air in the lungs is by diffusion and it
cannot be completed to deplete 100 per cent of oxygen from the air
(and also carbon dioxide from the blood).

11. Further, when we blow the breath by our mouth, this mixes with the
air that contains slightly more oxygen and a lot of nitrogen. The
reason for blowing to make fire is to remove the ash from the
charcoal or firewood so that fresh hot combustible material comes in
contact with the air containing oxygen.

12. Blowing also helps to direct the flame and heat in a desired direction
to assist combustion. More than the carbon dioxide it is the
abundant nitrogen that should come in the way. But there is enough
oxygen to sustain combustion and blowing helps to make fire.

13. The woodcutter was feeling very hungry. He took out a potato from
the handi. He tried to eat it but the potato was too hot. He again
began to blow on it – ‘foo, foo’. “Arre,” said Balishtiye to himself,
“He’s blowing again! Now what? Is he going to burn the potato?”
After blowing a few more ‘foo, foos’ on it, the woodcutter put it in
his mouth and began to eat it.

14. Now Mian was very surprised! He just could not stop himself and off
he went hopping to the woodcutter. “Hello brother”, he said, “If you
don’t mind, can I ask you a question again?” The woodcutter
replied, “Not at all. Ask whatever you want.” Mian Balishtiye said,
“This morning you told me that you blew on your hands to warm
them up. Now you are blowing on this potato, which is already so
hot. Why do you want to make it hotter?”

15. “No, no, my little friend. This potato is too hot. I am blowing on it to
cool it down.” When he heard this, Mian Balishtiye’s face became
white. He began to tremble with fear, and started to back away.
Water molecules in hot foods and drinks have enough energy to
escape into the air, changing from liquid water to gaseous water
(water vapor). ... When you blow on the food, you push away the
vapor cloud, lowering the vapor pressure and allowing more water
to evaporate.

16. Why does blowing on hot soup help to cool it off? It's because of
evaporation. Evaporation cools down a liquid because the most
energetic molecules leap off the surface and leave the slower-moving
molecules behind. ... The hot soup forms a little cloud of vapor above
it that prevents more evaporation from taking place.

17. The woodcutter was a good man. He said, “What’s wrong Mian? Are
you trembling because of the cold?” But Mian Balishtiye kept going
backwards. When he was a safe distance away, he said to himself,
“What kind of a creature is this? Surely he must be a ghost or a
djinn. Blow hot, blow cold with the same breath! It is just not
possible! That’s right there are some things which just cannot be –
but they are!

18. When hands are put at some distance from the mouth; the air blown
from the mouth does not feel much warm. This happens because the
air travels some distance and gets mixed up with the air around.

19. On blowing air from the mouth on the mirror, the mirror becomes
moist. The air blown from mouth is hot and the mirror is cold. The
hot air that we breathe out contains water vapours which turn into
tiny droplets of water when it comes in contact with the colder
mirror. This makes the mirror moist and hazy.

20. Basically, the same amount of air is coming out as when you said
“haa” but there is less space for it to flow through. This causes the
air to move faster as it actually comes out of your mouth. Faster
moving air cools off faster. I'm addition, the stream of air is thinner
which also makes it easier for it to cool.

21. Have you seen people playing different musical instruments like
flute, dholak, been ...., guitar, mridang, etc. Can you recognise their
sounds with your eyes closed? Find out more about these musical
instruments. Collect their pictures too. Have you seen people
different musical instruments like flute, dholak, been guitar,
mridang etc. Can you recognize their sounds with your eyes closed?
Find out more about these musical instruments. Collect their
picture.

22. All musical instruments create sound by causing matter to vibrate.
The vibrations start sound waves moving through the air. Most
musical instruments use resonance to amplify the sound waves and
make the sounds louder. Resonance occurs when an object vibrates
in response to sound waves of a certain frequency. Yes, I have seen
and can recognize the sounds of flute, dholak, been, guitar, mridang
etc. These instruments are discussed below:

23. A musical instrument is a device created or adapted for the purpose
of making musical sounds. In principle, any object that produces
soud can serve as a musical instrument. The academic study of
musical instruments is called organology.

24. This instruments which produce musical sounds are called
instruments. These are mainly of three types.
•String instruments
•Reed or wind instruments
•Percussion instruments

25. STRING INSTRUMENT: In these instruments, musical sound is
produced by vibrating strings. The pitch of sound can be changed by
altering the thickness, tightness or length of the strings. A short
length of a wore produces higher pitch. Sitar, guitar, violin, veena,
sarod etc. Are the examples of string instruments.

26. Reed or wind instruments: In wind instruments, the sounds are
produced by vibrating air columns. In these instruments air is blown
either directly or indirectly through reeds. By changing the length of
the vibrating air column, the pitch of sound can be changed .
examples are flute, shehani, mouth organ, bugle.

27. Percussion instruments: A percussion instrument is any object which
produces a sound when hit with an implement, shaken, rubbed,
scraped or by any other action which sets the object into vibration.
The term usually applies to an object used as a musical instrument.
In percussion instrument, the sounds are produced by the vibrations
of stretched skin or membrane. The loudness and the pitch of these
instruments can be increased by either striking the skin harder or
stretching the skin tighter. Dholak, drums, table, mridangam,
bongos Are percussion instruments.

28. JAL TARANG: It is a instrument made by using 6 to 8 bowls or
tumblers filled with water at different levels. The level increases
gradually from one ent to the other. When we strike the bowls one
after other with a light wooden stick, each bowl produces a sound of
different pitch. This is called a jal tarang.

29. In this phenomenon, the pitch is highest in the bowl with the
maximum amount of water and the lowest in the bowl with the least
amount of water. Short air column produces sound of higher
frequency. This concept is used in jal tarang. The bowl which has
more water has short length of air column., and therefore produces a
sound of higher pitch.

30. The air blown from the mouth is hot and the glass of the spectacles is
comparatively colder. The hot air we breathe out contains water
vapours which turns into tiny droplets of water when it comes in
contact with the colder glass.

31. You have all heard the ‘tick tick’ of the clock. Have you seen a doctor
using a stethoscope to listen to our chest? What do you think she
hears? Where is the sound coming from? Is there a clock inside your
chest that keeps ticking away? Do you want to listen to your
heartbeat? Take a rubber tube as long as the distance from your
shoulder to your elbow. At one end of the tube fix a funnel. Place the
funnel on the left side of your chest. Put the other end of the tube to
your ear. Listen carefully. Did you hear a dhak dhak sound?

32. The act or process of taking air into your lungs and releasing it: She
lay awake listening to her sister's steady breathing. I could hear the
sound of heavy breathing as he slowly climbed the stairs.
Synonym. Respiration.