Keyword: Telephone
- Dvořák L.: A Bit of Heuristics from Malá Hraštice, Fair 5, Praha 2000A few ideas from the assembly of students of the Department of Physics Education FMP CU. A guide on how to make a string phone with echoes, balance based on the Archimedes’ law, apparatus for measuring the Young’s modulus of jam, dumplings etc., amplifier constructed so that it picks up a magnet pendulum passing through its balance position. Everything is made of commonly available resources.