IYPT 2014, Задачи на турнира — Задача 4. Ball sound
27th IYPT (2014)
Заглавие в източника
Source: Problems for the 27th IYPT 2014 (iypt.org, Aug. 1, 2013)
Selection proposed by the Committee for Problem Selection on July 12; approved and edited at the IOC meeting in National Dong Hwa University on Aug. 1; released on Aug. 1, 2013
Reference Kit for 2014 (first day draft, Aug. 1, 2013) →
Exemplary solutions for 2014 →
When throwing pebbles into water, watch the ripples;
Otherwise throwing the pebbles becomes a futile pastime.
Kozma Prutkov
Условие
When two hard steel balls, or similar, are brought gently into contact with each other, an unusual ‘chirping’ sound may be produced. Investigate and explain the nature of the sound.
Решение
Внимание: Непълно решение
В архива няма официално решение на тази задача.
Оригинал в Архива: 2014.txt