Risultati della ricerca
Anno XLIX - n.2 - aprile/giugno 2016 Proviamo a capire la misura nella scuola dell’infanzia
Measure is crucial in science and mathematics because it makes it possible to express systems properties through physical quantities which are fundamental for an early formalization and construction of the scientific method in children. Didactic experiences at primary schools are often focused on the identification of order properties which are necessary for measuring procedures. […]
Anno XLIX - n.2 - aprile/giugno 2016 Alcuni aspetti della fisica degli autoveicoli
This article reports about certain aspects of the physics involved in automobile motion. First, we describe an experiment which aims at determining the friction experienced by a vehicle, as a function of its speed. By relying on commonly available instruments (a smartphone, […]
Anno XLIX - n.2 - aprile/giugno 2016 La relazione tra potenza e velocità nel ciclismo
This paper is a summary of a project prepared by an Italian student for the final State exam of Liceo Scientifico. The aim of the work is to understand fluid friction and rolling resistance involved in cycling. A simple physical model has been developed and it has been subsequently compared with experimental data collected by a tachometer and a power meter. […]
Anno XLIX - n.1 - gennaio/marzo 2016 “Relatività”: le insidie di un nome
The name “relativity theory” was an unfortunate choice and Einstein was unhappy about it.Some critical aspects are briefly discussed about use and misuse of that name in epistemology, in popular culture and within the philosophical debate of the time in Italy […]
Anno XLIX - n.1 - gennaio/marzo 2016 L’ipotesi della natura elettromagnetica della luce e la valutazione “classica” della sua velocità
Retracing the steps which led to formulate the hypothesis on electromagnetic nature of light, two circuits (RL, RC) in alternating current regimen were observed to measure the constants of vacuum permeability and permittivity, yielding μ0 = (1,27 ± 0,51)·10−6 H/m, […]
Anno XLIX - n.1 - gennaio/marzo 2016 La suscettività magnetica al variare della temperatura
We present an experiment to measure the temperature dependence of magnetic susceptibility of a dia-magnetic material such as pyrolityc graphite. Pyrolityc graphite is a typical diamagnetic material and can levitate in a strong magnetic field. the levitation height was changed by varying the pyrolityc graphite temperature using a lighter. […]
Anno XLIX - n.1 - gennaio/marzo 2016 Effetto contro intuitivo della gravità sulla capacità termica di una sfera solida: riesame di un problema ben noto
Tradotto e pubblicato con autorizzazione dell’American Association of Physics Teachers e degli autori da: G. De Palma, M. C. Sormani, “Counterintuitive effect of gravity on the heat capacity of a metal sphere: re-examination of a well-known problem”, American Journal of Physics, […]
Anno XLIX - n.1 - gennaio/marzo 2016 Tappi, tubi e bottiglie di plastica
A technique is explained on how to insert tightly and pressure whithstanding a thin poliethilene tube in the closing stopper of a plastic bottle […]