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Windows 7: Scientific question

25 Jun 2018   #1
F22 Simpilot

Windows 7 Ultimate x64
Scientific question

So I smoke. I go out on the back patio and as I'm watching my smoke rise from the cigarette I was curios as to why the smoke was rising so quickly and in a straight line most of the time. I realize that the heat from the cigarette would affect it, but the heat isn't very strong to effect the smoke stream more than 6" above the cigarette. So I as thinking air pressure was the reason as to why the smoke stream was so quick to rise off the cigarette.

What's say you?
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25 Jun 2018   #2

Windows 10 Pro x64 x3, Ubuntu

Thermodynamics and Newtonian Physics

Heat increases the air temperature, hot air rises, smoke is solid particles, (ash), carried in the air so it follows the heated air upwards, This would then continue as described in the first Newtonian law of motion until gravity acts on the smoke particles to overcome the initial force due to the heat

If carbon dioxide is denser than air, why does smoke rise up from factories? - Quora

Newton's Laws of Motion
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26 Jun 2018   #3
F22 Simpilot

Windows 7 Ultimate x64

I was thinking it was thermodynamics, but as I said the heat couldn't possibly effect the smoke stream more that 6". I mean, it's a stream that rises at last 12" and the heat is no more than a quarter inch in size. Perhaps it's also do to the fact the smoke particles are lighter than air.

HAHAHA!!! Your avatar.
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26 Jun 2018   #4

Windows 10 Pro x64 x3, Ubuntu

Smoke particles are heavier than air although they have little mass and without outside influences will eventually settle as a file carbon "dust" on surfaces (with tobacco smoke the presence of Nicotine in the smoke particals is what can result in yellowing of surfaces, even high ceilings over time). The Laws of motion when applied to the smoke particles results in A situation that when upward motion begins this continues until another force acts upon the particles to slow and eventually reverse the motion, as the major force involved is gravity and a small amount of resistance from the molecules of air's constituent elements

Obviously in the real world there are so many random air currents that the smoke dissipates far more quickly than it would in ideal conditions. the Butterfly effect, (theory not Movie ) shows how thermodynamics and general Fluid Dynamics are very complex systems where a small change can have large effects
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