Risultati della ricerca
Anno XXXI - n.1 - gennaio/marzo 1998 Tipi diversi di costanti in fisica e apprendimento significativo della disciplina
Data derived from teaching experience point to some problems referred to the conceptualization of constants that appear in relationship between physical magnitudes. Some significative problems are identified. Two general hypotheses and four derived hypotheses are formulated. In order to get more information some questionnaires are prepared. […]
Anno XXXI - n.1 - gennaio/marzo 1998 Pendolo di Foucault in miniatura da esposizione
A 3.5-meter long Foucault pendulum is realized for teaching and exhibition purposes. The pendulum operates continuously without need for maintenance or external control. The decay of the oscillation amplitude due to friction is compensated by the application of a pulsed central magnetic force, […]
Anno XXXI - n.1 - gennaio/marzo 1998 La fisica per…volare
Home-made one-stage, two-stage and three-stage water rockets were launched at an exhibit on “Physics for… flight”. The design details of the two-stage rocket are described. […]
Anno XXX - n.3 - luglio/settembre 1997 SFM: Microscopia a scansione di forza
A brief introduction to scanning probe microscopes and electron scanning microscopes is followed by a description of the scanning force microscope operating principle, of its performance and limits; some SFM images of semiconductor samples are shown as examples of the potentialities of this technique. […]
Anno XXX - n.3 - luglio/settembre 1997 Possibili effetti di radiazioni ionizzanti presenti in vecchi orologi
Small low intensity doses con be produced by some watches made in the period 1950-1960 by the presence of Ra-226 in the hands and some parts of the dials. The exent of the possible effects on the wearer of such watches is evaluated in this article, […]
Anno XXX - n.3 - luglio/settembre 1997 Un oscillatore non lineare
Non-linear physics is a fairly complex matter to handle. A physical system presenting a bifurcation, a non-linear oscillator, is described here along with the mechanical simulation of its potential, with the aim to offer a method of introduction of non-linear systems in secondary schools. […]
Anno XXX - n.3 - luglio/settembre 1997 L’attimo fuggente: ovvero come verificare la rotazione della Terra in meno di venti minuti
The rotation of the Earth produces an effect on the behaviour of a sufficiently long pendulum, as in Foucault’s experiment in 1851. This article illustrates an easy method to measure the Earth’s angular velocity with acceptable accuracy and in less than 20 minutes. […]
Anno XXX - n.3 - luglio/settembre 1997 PREMIO BONACINI – Dalla giostra al satellite: forze agenti su corpi in moto rotatorio
Bonacini prize 1995/96: “From the merry-go-round to the satellite: forces acting on rotating bodies”. The article, taken from the report of the first classified work. describes three experiments: the growth of small wheat plants on a turntable rotating night and day, […]
Anno XXX - n.3 - luglio/settembre 1997 Un nuovo modello di aggiornamento in servizio: il corso universitario “pedagogia e insegnamento della scienza”
The features of the in-service teacher training course Padagogik und Fachdidaktik fur Lehrer (PFL – Austria) for science teachers, on pedagogy and subject related didactics, are described. Most important is the tight connection between the work required during the course and the teacher situation. […]
Anno XXX - n.2 - aprile/giugno 1997 Cinematica generalizzata
Starting from a reflection on the conceptual structure of physics, an approach to the description of different phenomena analogous to the kinematic approach to motions proposed. An explanation using the concept of energy as a primitive concept is then suggested. […]
Anno XXX - n.2 - aprile/giugno 1997 Didattica disciplinare e bisogni formativi: risultati di un’indagine tra i frequentanti di un corso di perfezionamento per la formazione degli insegnanti
This article reports the results of two questionnaires on the backgrounds, attidudes and expectations of a substantial group of young science and mathematics teacher enroled in a university based specialisation course. The composition of the group can be confidently considered typical of the Italian situation, […]