IYPT 2018, Задачи на турнира — Задача 13. Weighing Time
Problems for the 31st IYPT 2018
Release note and epigraph
Released by the IOC on July 13th, 2017
The originator of a new concept finds, as a rule, that it is much more difficult to find out why other people do not understand him, than it was to discover the new truth.
Hermann von Helmholtz
Условие
It is commonly known that an hourglass changes its weight (as measured by a scale) while flowing. Investigate this phenomenon.
Решение
Внимание: Непълно решение
Това е открита изследователска задача — официални решения не се публикуват.
Оригинал в Архива: 2018.pdf