- Dvořák L.: A Bit of Heuristics from Malá Hraštice, Fair 5, Praha 2000
A 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.
- Dvořák L.: Experiments in Malá Hraštice – this time with heat, Fair 13, Plzeň 2008
This contribution describes a simple demonstration of adiabatic process, especially the difference between adiabatic and isometric process. There is also described a set of experiments to demonstration and measurement of the heat transfer by radiation using ICT or simple cheap devices
- Dvořák L.: How to weigh using ammeter and voltmeter or Make your own (almost) Kibble scales, Fair 25, Praha 2020
The paper describes two experiments concerning free fall of systems combining elastic and inertial mass. The described experiments represent two extreme situations: 1) elastic mass is negligible, 2) all the falling mass is elastic.
- Dvořák L., Kácovský P.: More Ideas from Malá Hraštice (Easy Experiments with Famous Names in the Background), Fair 23, České Budějovice 2018
The paper describes several experiments associated with the names of famous physicists: 1) ‘almost Rutherford’s’ experiment which deals with repulsion of macroscopic objects, 2) simple verification of the Ampère’s law of total current, 3) repelling magnets, when the poles of thin long magnets repel in analogy with the Coulomb's law, but with shorter magnets it’s more complicated and 4) the Oersted’s experiment.
- Dvořák L.: More Ideas from Malá Hraštice, This Time with Water, Fair 22, Olomouc 2017
The paper describes a few experiments with water conducted at the spring assembly in Malá Hraštice: 1) the effect of diamagnetism of water on the water surface above the magnet, 2) the apparent depth of an object in water when watching from different angles, 3) a simple measurement of water viscosity and 4) a vertical and horizontal ‘throwing of water’ with the use of a plastic syringe and their connection to the continuity equation.
- Dvořák L.: Other ideas from Malá Hraštice 4, Fair 19, Cheb 2014
The paper presents seven suggestions for experiments which have been tried and newly designed at the spring training camp for future and present physics teachers. It is not about the most accurate measurement, but about how students can practise various parts of mechanics from primary school level to high school level on the task to measure gravity.
- Dvořák L.: Other ideas from Malá Hraštice: magnets’ repulsion, Fair 24, Hradec Králové 2019
The paper presents several experiments with simple equipment designed to measure the force between small magnets. These experiments were designed during spring training camp for future and present physics teachers at Malá Hraštice.
- Dvořák L.: Other Ideas from Malá Hraštice: The Pit and the Pendulum , Fair 21, Brno 2016
The paper describes an experiment compiled at the spring assembly in Malá Hraštice. With the use of simple tools, a pendulum was created. This pendulum allows to examine and measure the oscillations with a greater amplitude. Consequently, the
construction was improved to minimize measurement errors.
- Dvořák L.: Physics with The Laughing Cow – or experiments with very simple equipment, Fair 10, Praha 2005
A collection of simple experiments from the field of mechanics, oscillatory motion, acoustics and optics conducted with cheese boxes.
- Dvořák L.: The “Wander Fly” Magic Wand and Czech Physics Teacher, Fair 16, Olomouc 2011
This contribution describes the utilization opportunities of “Wander Fly” wand which can come to (not only Czech) teacher’s mind. It also gives some ideas how to replace the original flying objects made from a thin foil that are easily damaged.
- Koudelková V., Dvořák L.: Three experiments inspired by secondary school students’ misconceptions about electricity and magnetism, Fair 18, Hradec Králové 2013
The contribution describes three experiments which were inspired by the very frequent secondary school students’ misconceptions about electricity and magnetism. The first experiment relates to a charge on an insulator, the second one demonstrates qualitatively Coulomb’s law and the third experiment illustrates behaviour of a coil in a homogeneous magnetic field. The misconceptions are described as well as are the results of research that demonstrate a relevant misconception for each experiment respectively.
- Dvořák L.: Unconventional Measuring Equpiment, Fair 6, Olomouc 2001
A construction of three measuring devices. The first one measures the magnetic induction, the second is a LED voltmeter and the third represents scales consisting from a small tractor, which goes up and down a seesaw.
- Dvořák L.: Unusual measuring instruments 4: Measuring short time intervals, Fair 9, Brno 2004
Measuring of the duration of a hammer blow against an anvil by charging a condenser, mathematical analysis included.