IYPT 2014, Задачи на турнира — Задача 15. Oil stars
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
If a thick layer of a viscous fluid (e.g. silicone oil) is vibrated vertically in a circular reservoir, symmetrical standing waves can be observed. How many lines of symmetry are there in such wave patterns? Investigate and explain the shape and behaviour of the patterns.
Решение
Внимание: Непълно решение
В архива няма официално решение на тази задача.
Оригинал в Архива: 2014.txt