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J. Perelman
"Entertaining physics". Book 1.
Chapter 6. Thermal phenomena


On the box lies cigarettes. She smokes at both ends. But the smoke that is released through the mouthpiece falls down , while the other end he winds up. Why? After all, it would seem, on this side and on the other hand stands the same smoke.

Why smoke cigarettes from one end goes up the other goes down?

Yes, the smoke is the same, but over the smoldering end of the cigarette has an upward current of heated air, which carries the smoke particles. The air, passing along with the smoke through the mouthpiece, time to cool off and not fond of is already up; and as the smoke particles themselves are heavier than air, they sink down.

Entertaining physics J. Perelman


System Orphus


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