IYPT 1994, Задачи на турнира — Задача 3. Magnetism

7th IYPT (1994)

Условие

Think up a problem yourself (problems 1, 2, 3). Invent yourself and solve a problem on the given theme.

A cylindrical permanent magnet falling inside a copper tube is found to move at an almost constant velocity, the slower the thicker and the walls of the tube. Use this fact to formulate a problem (See also 14).

Решение

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Оригинал в Архива: 1994.txt