IYPT 1989, Задачи на турнира — Задача 2. Noon
Problems for the 2nd International Young Physicists’ Tournament
Внимание: Бележка към темата
The original header prints 1988, although this is the 2nd IYPT problem set for 1989; the edition’s note [1] and its bibliography identify the 1989 event. The printed header is retained.
Critical edition
Olympiets Youth Center, Moscow, Soviet Union; March 24‒April 2, 1988 [1]
Critical edition: translated, restored, and commented text [2]
FINAL DRAFT. — Please do not re-publish. Suggestions and criticism welcome
Translated, edited and commented by Ilya Martchenko. The original edition’s historical notes, sources and acknowledgments are retained with problem 1.
Епиграф
Squamps are hunted from the inside only.
S. Lem [3]
Условие
Is it possible to call “noon” the moment in the middle of the time interval between sunrise and sunset? Using a calendar, you will easily notice that throughout the year this moment “drifts” relatively to a certain moment of time. Explain the cause of this effect. [6]
Note [6]
In [Jordens 1989], the problem reads: “Noon. Can we call "noon” the moment exactly at the middle of the time- stretch between sunrise and sunset? With the help of a calendar you can easily make sure that this moment wanders during the year. Explain the cause of this effect”
Решение
Внимание: Непълно решение
В архива няма официално решение на тази задача.
Оригинал в Архива: 1989.pdf