IYPT 1997, Задачи на турнира — Задача 13. Tea cup

10th IYPT (1997)

Заглавие в източника

Source: Školská fyzika, 1996/1997, 1, 99—100, Vlado Koutny ca. 1999
Problems selected at an unkown time
Exemplary solutions for 1997 →

Условие

If one fills a cup with hot tea (60 °C — 80 °C), a thin layer of steam emerges above the surface. One can see that some parts of the steam layer disappear suddenly and reappear after a few seconds. Investigate and explain this phenomenon.

Решение

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Оригинал в Архива: 1997.txt