How can the same wind fan a fire and blow out a candle?

Answer 1

A fire needs oxygen to keep burning... A wind brings more air, and so more oxygen... It also moves the flames in the direction of the wind, giving it a chance to grow.

A candle flame burns due to melted wax. (The hot flame melts wax below and fuels the flame... thus it goes on). When you blow at a candle you blow at a candle you take away this gaseous wax. The flame dies out due to lack of fuel, not due to excess of air.

Answer 2

It is a matter of size; both the fire and the wind. During the conflagration (out of control burning) of city blocks in the past, dynamite was used to "blow out" the flames. If the fire is large a wind will supply needed oxygen and if the fire blows out in a gust of wind, the embers may have enough heat to rekindle the fire. When you light a candle, it is not the wax that burns even though the wax does supply the fuel. The match vaporizes some of the wax and ignites it. By blowing on the candle you blow away the wax vapor and cool off the remaining wax so that it stops making vapor. Candles can also be put out by breathing oxygen-poor/carbon-dioxide-rich exhalations or covering the candle with an inverted snuffer allowing it to use up the oxygen. This does not work on a house fire because of size.

Answer 3

when it fans the fire it has high content of oxygen and it burns as a fuel for the fire, when it blows the candle it actually displaces the heat or if we blow into a candle we give out carbon dioxide which again stops the fuel for it to burn

Answer 4

It's relevant to the size of the flame, the bigger the flame, the more wind/air it can take without being blown out.

Answer 5

because one is so much greater than the other