IYPT 2011, Задачи на турнира — Задача 7. Cup drum

24th IYPT (2011)

Заглавие в източника

Source: Problems for IYPT 2011 (iypt.org, July 17, 2010)
Selected at the IOC meeting in Gössing on July 16—17, 2010
Reference Kit for 2011 (final edition, July 29, 2011) →
Exemplary solutions for 2011 →

Условие

A plastic cup is held upside-down and tapped on its base. Investigate the sound produced when the open end of the cup is above, on or below a water surface.

Решение

---

Оригинал в Архива: 2011.txt