what is the principle behind blowing off a candle ?

Question

Flame needs oxygen to burn effectively but by blowing air we are thereby increasing oxygen content , still the flame is put off instead of burning more .. so whats the principle be hind this ?

Answer 1

fire requires 3 things:

1) oxygen ... ("air" or equivalent, eg chlorine, flourine ...)
2) fuel ... paraffin
3) heat ... self-sustaining from the flame/oxidation

when you blow out a candle, you have removed the heat (3)


fire stops

qed

Answer 2

Flame is actually a collection of hot gases emitted by the wick and the burning wax. When we blow air or when the candle is placed in a strong breeze, the mass of hot gas is displaced (blown off) and the wick gets cooled by the draft. Thus the burning of the wax is interrupted. Similar thing happens when we strike a match in a strong wind.

Answer 3

When you breathe air into your body to blow out onto a candle your body is absorbing the oxygen in the air and what comes out of your lungs and through your mouth is air with less oxygen than the air outside your body that the candle is burning

Answer 4

Why can we've candles on birthday truffles? Candles on birthday truffles have been around for some important time. Birthday celebrations have been initially no longer celebrations in any respect, in accordance to 3; quite, human beings traumatic that they may well be attacked with the aid of spirits on the anniversary of their beginning, and so clustered with friends and kin as a fashion to maintain risk-free. This quasi-religious component to a birthday "social gathering" persevered; we've birthday truffles with the aid of fact the two the Greeks made around truffles to venerate Artemis, goddess of the moon, or with the aid of fact the Germans made a definite bread (which could be suggested as Geburtstagorten and might no longer) in the form of the toddler Jesus' swadding clothing. The candles have been an extension of this; Gibbons suggested in 1986 that the Greeks positioned candles on their around truffles to cause them to glow like the moon, hoping to learn Artemis' particular favour. nonetheless, the candles have been meant to hold the birthday desires as much as God (or the gods), alongside with the smoke. some Germans even immediately place a huge candle in the centre of a birthday cake to symbolise the "easy of existence" (from Corwin, 1986). including various candles that correspond with years is a reasonably obvious extension of the final candles-on-truffles theory, as quickly as you're into it besides. Blowing them out is, i think, merely executed with the aid of fact this is enjoyable to blow out candles, now that the religious component has dwindled away particularly. besides, in case you do no longer blow them out then you definately can not inflict on human beings those trick candles that relight, which may well be the tip of a venerable birthday traditio

Answer 5

athiestfor.. and Vaibhav have it.
For others - if you exhaled more CO2 than O2 then artificial respiration would be useless. Your body converts some O2 to CO2, but most of the O2 is breathed back out.

Answer 6

actually when v blow air at the candle, we are lowering the temperature of wick and the wax vapours are also blown off.....these 2 factors account for......extinguishing the candle

Answer 7

Exhaling produces more CO2 than O2. Plus, it's a forceful puff which is greater than the flame.
If you blow on campfire ashes they ignite because they're lacking O2.

Answer 8

actually, we exhale carbon dioxide.