My girlfriend and I have got into a lively debate about whether or not my flatmates can smell the smoke I blow out my window. Can you help us? Here is the scenario.
The smoker, places himself perched upon the window, with his cigarette placed in his left hand, which remains outside permanently and remaining at least 15cm away from the window at all times.
It's winter in Edinburgh (it's 2 degrees celcius outside). The room temperature is about 21 degrees.
When the smoker exhales, he projects a thin stream of smoke directly outside (at 90 degrees). (so as, to move it as cleanly and as far away as possible)
There is very little wind outside.
- Hotter air has a higher air pressure than cooler air
- The room is hotter than outside, so it has a higher air pressure.
- High pressure air always flows to low pressure air
We can hope to assert:
- That although the smoke is hot upon being exhaled, it will cool rapidly when exposed to the 2C air and thereby achieve an air pressure significantly low enough to be unable to cross ithe nside/outside threshold due to difference in air pressure between itself and the room.