IYPT 1997, Задачи на турнира — Задача 16. Roget’s spiral

10th IYPT (1997)

Заглавие в източника

Source: Školská fyzika, 1996/1997, 1, 99—100, Vlado Koutny ca. 1999
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Exemplary solutions for 1997 →

Условие

The Roget’s Spiral is a device where a source of current is connected to a vertically suspended spring, the lower end of which dipped into mercury. Mercury is a highly dangerous chemical substance and thus the experiments with it are not permitted. Substitute the mercury with a less dangerous substance and investigate the functioning of this device.

Решение

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Оригинал в Архива: 1997.txt