Objects that are thrown up falls down due to gravitational force.Why fire won't come down but goes up?

Question

If we throw something up, it immediately falls down to the earth due to the gravitational force of earth. But when we ignite fire, it goes up and up rather.Can anyone please explain me why?

Answer 1

From my understanding there are actually several differnt things that happen in fire. Fire is technically the manifestation of energy as heat and light. Energy is not subject to the laws of gravity however the particles affected by it are. The flames of fire are actually particles that are superheated till they glow. These particles move up because they are caught in the hot air around them and hot air rises. Once they get a certain distance from the energy source they begin to cool and pass their energy to the air around them. Because the energy is transferred the particle loses energy and stops glowing. Once the particle has transferred enough of its energy to nearby air it will eventyually fall to the ground. Be aware that these particles can be realistically anything.. macroscopic or microscopic matter of any kind. The air that absorbs the energy of the particles will eventaually transfer its energy to something else and it will start moving down... That made sense to me but it may not to you... : ) lol

Answer 2

Fire is not a substance, rather an energy manifestation (heat). Hot air is lighter than cold air and so rises. However, as the hot air rises it cools and, at that point, gravity takes over and it falls back toward Earth. The substantial products of fire (ash, cinders, etc.), which when hot, may also rise, will also eventually succumb to gravitational force.

Answer 3

Air bubbles inside water comes up. Since the density of air is less than water it comes up.

Therfore hot air which is less dense than cold air goes up.

When you heat an iron rod it becomes red hot. Similarly hot air gives up light.

The burning gas which when going up also emits light. This we call fire.

Answer 4

fire is fuelled by oxygen, oxygen being one of the lightest gasses then it stands to reason that it would rise. A flame will continue to rise until it meets with an object (which it will burn through) or until it runs out of a fuel supply.

Answer 5

Fire isn't an object, it's energy. Energy is not subject to the laws of gravity. Plus, fire feeds on oxygen, which is mostly up...

Answer 6

Heat rises-but i wouldnt say fire does not burn downwards.If you set fire to a haystack by lighting the very top of it,it will still burn to the ground,-perhaps not as fast as if you lit the bottom.??

Answer 7

Fire is nothing but small unburnt particles of carbon floating in air which radiate heat and light..since they float in air..flame seems to be going upward.

Answer 8

If you pour water into a container containing oil, oil will rise and it will form a separate layer on H2O bec. it is lighter than water. similarly fire is lighter than air

Answer 9

yep, bubles go up...
and hot air balloons go up too

same thing:

flames are made of ionized gaz (heated gaz) or plasma (imagine a superheated gaz, if you don't know what plasma is).

in short, flames are heated gaz... and since it's hot, it will want to take up more space than cold gaz. And if you listen to archimedes, you'll know that that heated gaz (and therefore LOW DENSITY) will want to go up, and not down.

Answer 10

flammable gases have density less the 1(for the air),thus they are lighter than air,so they diffuse to lower pressure above the air and burn,these y u think they goes up