European Journal of Physics最新文献

Stabilisation of the swing pattern of an anisotropic simple pendulum 稳定各向异性简摆的摆动模式

European Journal of Physics Pub Date : 2024-07-15 DOI: 10.1088/1361-6404/ad6362

E. McGlynn, Christian Saracut, Anthony A. Cafolla

{"title":"Stabilisation of the swing pattern of an anisotropic simple pendulum","authors":"E. McGlynn, Christian Saracut, Anthony A. Cafolla","doi":"10.1088/1361-6404/ad6362","DOIUrl":"https://doi.org/10.1088/1361-6404/ad6362","url":null,"abstract":"\u0000 The suppression of the effects of anisotropy on a pendulum by use of a rotating mount was initially envisaged by Léon Foucault, based on his observations of the vibrations of a rod clamped in a lathe. However, the method seems to never have been tried due to the practical difficulties involved. We report a computational study of the stabilisation of the swing pattern of a simple pendulum, showing anisotropic behaviour in a static configuration, by rotation of the system mount. When the mount is static, for most initial conditions the swing patterns quickly evolves into unstable, complex Lissajous-like patterns. When the pendulum mount is rotated faster than the pendulum frequency effects of anisotropy are suppressed, and the swing pattern stabilises to that of an isotropic 3D simple pendulum. Suppression of mount anisotropy influence occurs for relatively low rotation rates. We also study swing evolution in the presence of random variations in the orientation of the mount principal axes. The use of computational techniques confirms Foucault’s original observations and hypothesis and provides an interesting avenue for students to engage meaningfully with this historically important and inspiring experiment in a novel and challenging manner.","PeriodicalId":505733,"journal":{"name":"European Journal of Physics","volume":"34 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141647601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the Natural Units and Their Hidden Role in the Laws of Physics 了解自然单位及其在物理定律中的隐藏作用

European Journal of Physics Pub Date : 2024-07-10 DOI: 10.1088/1361-6404/ad61d3

David Humpherys

引用次数: 0

Force, Inertia and Motion from Aristotle to nowadays didactics 从亚里士多德到当今的教学法：力、惯性和运动

European Journal of Physics Pub Date : 2024-07-10 DOI: 10.1088/1361-6404/ad61d0

Franco Bocci

{"title":"Force, Inertia and Motion from Aristotle to nowadays didactics","authors":"Franco Bocci","doi":"10.1088/1361-6404/ad61d0","DOIUrl":"https://doi.org/10.1088/1361-6404/ad61d0","url":null,"abstract":"\u0000 This study delves into the historical development of the core principles of dynamics, namely the interplay between forces and motion. We explore the intricate and nonlinear transition from the Aristotelian framework, which held sway for eighteen centuries, to the Newtonian paradigm. We posit that the complexity of this transition largely stems from what we perceive as an inadequate understanding of force. Our focus lies particularly on the seminal contributions of Galileo and the subsequent remarkable advancements made by Newton. However, we also note that, somewhat surprisingly, the transition doesn't conclude with Newton himself. What is commonly known as Newtonian dynamics in modern textbooks diverges significantly from the original theory outlined in the Principia, and we endeavour to elucidate these disparities. In the concluding sections, we scrutinise the implications of these concepts for contemporary teaching methodologies. Specifically, we delve into various interpretations of the Principle of Inertia, the Second Law, and their interrelationship, pinpointing what we perceive as weak points in current didactic approaches and proffering some suggestions for effectively imparting these concepts.","PeriodicalId":505733,"journal":{"name":"European Journal of Physics","volume":"18 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The three-dimensional harmonic oscillator and solid harmonics in Bargmann space 巴格曼空间中的三维谐振子和实体谐波

European Journal of Physics Pub Date : 2024-07-10 DOI: 10.1088/1361-6404/ad61d1

D. Sunko, J. Cioslowski

引用次数: 0

Supporting laboratories in physics education with virtual experiments videos 利用虚拟实验视频为物理教育中的实验室提供支持

European Journal of Physics Pub Date : 2024-07-10 DOI: 10.1088/1361-6404/ad61d2

Athanasios Velentzas, Alkisti Dimakopoulou, Ioannis Theodonis

引用次数: 0

The simplest method for the accurate determination of noon 精确测定正午的最简单方法

European Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1361-6404/ad6066

Martin Perea Alvarez de Eulate

引用次数: 0

Inertia from radiation. A semiclassical approach 来自辐射的惯性。半经典方法

European Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1361-6404/ad6065

C. Figueroa, S. Saracho

引用次数: 0

Using students’ critical aspects to deepen understanding of nuclear physics concepts 利用学生的批判性思维加深对核物理概念的理解

European Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1361-6404/ad6064

J. Kriek, Tafesse Kabtihymer Atlabachew

{"title":"Using students’ critical aspects to deepen understanding of nuclear physics concepts","authors":"J. Kriek, Tafesse Kabtihymer Atlabachew","doi":"10.1088/1361-6404/ad6064","DOIUrl":"https://doi.org/10.1088/1361-6404/ad6064","url":null,"abstract":"\u0000 Identifying students’ understanding provides a pathway to develop focused teaching to facilitate conceptual understanding. This study aimed to gain more insight into undergraduate students’ conceptual understanding of two nuclear physics concepts. Literature shows that students face difficulties in learning and understanding them. These concepts are nuclear binding energy (NBE) and nuclear force (NF). Phenomenography was used to provide a special qualitative research approach to exploring students’ in-depth understanding, which was not addressed in previous studies. Data were collected from purposively selected students (N = 30) through semi-structured interviews. Phenomenography was used to reveal the different ways in which students’ understand these concepts and serves as indicators of potential conceptual difficulties. Based on these, the relevant and irrelevant critical aspects discerned by students were identified using the variation theory of learning. These critical aspects illustrated how the students understood each concept. For instance, NBE is the energy that must be added to a nucleus to separate it into its constituents and relates to a relevant critical aspect. But, NBE is the energy that binds nucleons and this relates to an irrelevant critical aspect. These critical aspects can provide crucial information that can assist physics instructors in developing focused teaching and learning strategies. Thus, the responses to the interview can be used as a basis for teaching and learning nuclear physics concepts.","PeriodicalId":505733,"journal":{"name":"European Journal of Physics","volume":"122 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple methods for converting equations between the SI, Heaviside-Lorentz and Gaussian systems 在国际单位制、海维塞德-洛伦兹制和高斯制之间转换方程的简单方法

European Journal of Physics Pub Date : 2024-07-08 DOI: 10.1088/1361-6404/ad6067

Paul Quincey

{"title":"Simple methods for converting equations between the SI, Heaviside-Lorentz and Gaussian systems","authors":"Paul Quincey","doi":"10.1088/1361-6404/ad6067","DOIUrl":"https://doi.org/10.1088/1361-6404/ad6067","url":null,"abstract":"\u0000 School and undergraduate students are almost always taught the equations of electromagnetism using a set of conventions that are described as the SI. More advanced students are often introduced to different conventions that produce different equations for the same relationships, using either the Gaussian or Heaviside-Lorentz systems. In general, the connection between these equations is not simple. However, if the basis of each system is understood, conversion from SI equations to either Gaussian or Heaviside-Lorentz ones is very straightforward. The reverse processes are less straightforward, but more comprehensible when the fundamental differences are understood. Simple methods for these processes are presented, using a novel application of dimensional analysis, without factors of ε01/2 or (4πε0)1/2 appearing. It is also shown that when different physical quantities are given different symbols, and these are used consistently, the SI can be seen to provide general equations, with the Gaussian and Heaviside-Lorentz ones being simplifications of them. This removes any need for ‘system-independent’ versions of electromagnetic equations, with additional parameters that take different values in the different systems, which have been proposed in various forms over many decades.","PeriodicalId":505733,"journal":{"name":"European Journal of Physics","volume":" 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An alternative to the Euler equation 欧拉方程的替代方案

European Journal of Physics Pub Date : 2024-07-03 DOI: 10.1088/1361-6404/ad5ed9

A. Fariborz

引用次数: 0