Risultati della ricerca
Anno XXXV - n.3 - luglio/settembre 2002 Il freno ettromagnetico: un altro esperimento sulla legge di Lenz
An experiment on electromagnetic braking with Real Time Laboratory, using a motion detector and a force sensor, allows measurements of the force acting on a magnet falling inside a metal tube and its velocity versus time, giving opportunities for modelling transient phenomena. […]
Anno XXXV - n.3 - luglio/settembre 2002 Il dibattito sull’insegnamento della fisica e proposte di cambiamento in alcuni paesi stranieri
A review of international contributions to the debate on the prospects for the teaching and learning of science and physics in schools, with special regard to the aspects on the forefront of the debate on school reform in Italy today. […]
Anno XXXV - n.2 - aprile/giugno 2002 Titius e Bode contro Keplero: un’attività didattica sul concetto di legge fisica
The law of Titius and Bode is presented and the meaning of the word ‘law’ is discussed. A comparison is drawn with Kepler’s third law and several school applications are examined. […]
Anno XXXV - n.2 - aprile/giugno 2002 Teorema di Carnot e rendimento del motore ideale
Carnot’s theorem and the ideal engine’s efficiency. This article discusses the efficiency formula proposed in a former article by another author, and shows how it can lead to contradictions when applied to particular cycles where heat is exchanged with only two reservoirs. […]
Anno XXXV - n.2 - aprile/giugno 2002 Velocità del suono in aria
The article describes an easily performable and understandable measurement of the velocity of sound in the air. […]
Anno XXXV - n.2 - aprile/giugno 2002 Un nuovo interferometro: l’«interferometro di Fresnel»
A compact, self-contained, pre-aligned apparatus for demonstrating interference phenomena and measuring the wavelength of the light is presented. The interference fringes are displayed on a TV screen, and the measurements may be performed in a neat and clear way. Critical construction details are also given. […]
Anno XXXV - n.2 - aprile/giugno 2002 Onde sull’acqua con materiali poveri
Hands-on experiments with water waves tend to be messy, especially if many students work together in the classroom. This article suggests ways of performing them at home using simple items readily available in any kitchen. […]
Anno XXXV - n.2 - aprile/giugno 2002 Esperimenti con le onde ultrasonore
Simple transmitters and receivers of ultrasonic power allow the direct measurement of wavelength and speed of sound in air with precision of 1% or better. They may also be used for qualitative observations of diffraction and interference phenomena. […]
Anno XXXV - n.2 - aprile/giugno 2002 L’insegnamento della fisica
Nowadays, teachers are assailed by plenty of proposal on the ‘best way’ of teaching Physics. Be carefu… and, meanwhile, go back to study Physics, again and again. […]
Anno XXXV - n.1 - gennaio/marzo 2002 La fotografia digitale nello studio della meccanica classica
The author describes an imaging method he uses in the physics lab in connection with experiments involving bodies in motion. The bodies are photographed with a good digital camera that allows long exposures. The resulting files are immediately loaded in a PC, […]