The data presented in this paper is related to Physics problem-solving strategies collected from Rwanda secondary schools. This comprehensive dataset derived five interrelated studies investigating the impact of systematic strategy on students' achievement, engagement, and attitudes Rwandan school physics education. It comprises quantitative qualitative through quasi-experimental designs, involving around 160 students two districts Rwanda. Key sources include pre-and post-test scores...

<span lang="EN-GB">This study investigated students’ attitudes towards physics in Nine Year Basic Education (9YBE) Rwanda. Data were collected from 380 students Kayonza and Gasabo Districts using a test. Findings illustrated that more than quarter of participants felt learning is boring. About 39% think the subject does not relate to real-world experience. A significant number had negative terms effort required for learning. The findings also showed overall level problem-solving skills...

Abstract Physics education plays a crucial role in preparing students for success by equipping them with essential problem-solving skills. This study intended to investigate the effects of systematic physics (SPPS) on secondary school students’ learning achievement. The employed quasi-experimental research design. participants involved 116 senior five selected purposively from four schools within Kamonyi and Nyarugenge districts, Rwanda. Thus, 61 formed control group, 55 an experimental...

The propagation of dust ion acoustic solitary waves and double layers is studied in a dusty plasma with heavy adiabatic positively charged grains lighter positive ions Cairns-distributed electrons using the arbitrary amplitude Sagdeev pseudopotential approach. analysis shows that this model supports solitons limited by occurrence sonic point negative layers. Solitons both polarities coexist for range some parameters. We have shown at critical dust-to-ion density ratio, f, which third...

We present a comprehensive study of nonlinear periodic waves, namely, the Korteweg--de Vries (KdV) and modified KdV (MKdV) cnoidal snoidal waves in two-electron-temperature plasma. In limiting case, these reduce to bounded structures, compressive rarefactive solitons, MKdV double layers. The existence regions for parameter space (${\mathrm{\ensuremath{\mu}}}_{\mathit{e}}$,${\mathrm{\ensuremath{\sigma}}}_{\mathit{e}}$), where ${\mathrm{\ensuremath{\mu}}}_{\mathit{e}}$...

Considering the appropriate coordinate transformation and charge separation effect, reductive perturbation method is used to derive a mKdV equation for multi-component magnetized plasma having two Maxwellian electron distributions warm adiabatic ion distributions. The double layer solution of discussed in detail. It found that width increases as we increase obliqueness θ, where θ angle between wave vector magnetic field, while effect on amplitude negligible. finite temperature (decrease)...

The synthesis of metallic nanoparticles is an active area academic, application research as well and nanotechnology. Different chemical physical procedures that are currently used for present many problems. These problems include generation hazardous by-products, use toxic solvents, high energy consumption. Biological by bacterial, fungi, yeast, plant extract the best alternative to develop cost effective, less labor, non-toxic using more green approach, environmentally benign avoid adverse...

Physics course is seen by both teachers and students as difficult when it comes to teaching learning. Thus, there a need think of integrate new innovative ways which guarantee an improved physics conceptual understanding. This study investigated the effect interactive computer simulations on academic performance learning motivation students. It used quasi-experimental design with quantitative approach. The participants were 163 senior five Rwandan (80 in control group 83 experimental group)....

We have studied obliquely propagating dust-acoustic nonlinear periodic waves, namely, cnoidal in a magnetized dusty plasma consisting of electrons, ions, and dust grains with variable charge. Using reductive perturbation method appropriate boundary conditions for we derived Korteweg–de Vries (KdV) equation the plasma. It is found that contribution to dispersion due deviation from approximation dominant small angles obliqueness, while large magnetic force becomes important. The wave solution...

Obliquely propagating ion-acoustic nonlinear periodic waves in a magnetized plasma consisting of warm adiabatic ions and two Maxwellian electron species are studied. Using the reductive perturbation method, Korteweg–de Vries (KdV) equation is derived its cnoidal wave solution discussed. It found that as amplitude increases, so does frequency. The effects variations density temperature ratios species, ion temperature, angle obliqueness magnetization on characteristics discussed detail. When...

Abstract Using the reductive perturbation method, we present a theory for dust–acoustic nonlinear periodic waves, namely cnoidal in plasma containing hot electrons and ions, warm dust grains with varying charge. It is found that frequency of wave function its amplitude. also grain charge fluctuation other parameters modify properties waves. In limiting case, these waves reduce to well-known solitons.

The pseudopotential approach is used to investigate the ion thermal and electron superthermal effects on slow mode solitary wave propagation characteristics in a negative plasma, comprising warm positive ions kappa-distributed electrons. Sagdeev for plasma model derived analyzed systematic way. While it well known that supports of fast normal solitons, found supports, addition supersolitons double layers high values density. occur as lower limit supersoliton existence range limiting factor...

Using the general formulation of reductive perturbation method, Korteweg–de Vries (KdV) equation is derived for an electron-beam plasma with hot isothermal beam and electrons warm ions. The soliton solution KdV discussed in detail. It found that above a critical velocity two additional ion-acoustic branches appear. corresponding to linear modes, system supports existence compressive as well rarefactive solitons depending upon parameters, while other wave only solitons. effect different...

The propagation characteristics of ion-acoustic rarefactive soliton (IARS) in a two-electron temperature plasma with two cold ion species are investigated considering the nonisothermal distributions electrons using kinetic model and fluid for both species. Using Sagdeev potential formalism nonlinear dispersion relation expression width derived IARS. variation Mach number IARS amplitude is studied numerically compared earlier theoretical results as well experimental observations. It found...

<p style="text-align: justify;">We investigate students’ misconceptions in electrostatics, direct current (DC) and magnetism which are important electricity magnetism. We developed administered a multiple-choice questionnaire test to reveal related charged bodies, lightning, electric fields, potential, forces, DC resistive circuits magnets. This aimed at obtaining quantitative information about was 380 senior two students from Nine Year Basic Education (9YBE) Schools. The selected have...

<p style="text-align: justify;">Guided by the analytical framework in current literature, whereby ten nature of science (NOS) aspects were targeted, this study aims at assessing extent to which three physics textbooks for Cycle 4 Fundamental Schools Burundi represent NOS aspects. The quantitative embedded research design combines qualitative and both representations text images applied collect analyses data. Three used as I, II III (grade 7 textbook, grade 8 textbook 9 textbook)...

This paper reports science tutors’ perceptions about curriculum reforms occurred in Rwanda from 1996 to 2013 Teacher Training Colleges (TTCs). It also highlights their challenges and factors for effective implementation of Integrated Science Curriculum (ISC). Data the study were collected 26 tutors teaching ISC 11 TTCs 4 provinces using questionnaires structured interviews. Results showed that a slim majority not resistant reform. Even if most confident while topics ISC, they have...

Concept inventories (CI) constitute a key thread in Physics Educational Research. As such, understanding the methodology and technique of developing good CI is essential for all physics teachers. This research aims to develop circular-motion concept Inventory (CMCI) that valid Ugandan context. To reach consensus, we used Delphi collect data from eleven experts discipline. These were asked rank each item inventory, based on relevant criteria, assigning degree relevance adoption scale ranging...

For several decades, nature of Science (NOS) has been advocated as the fourth dimension science teaching and is a fundamental source in-depth learning teaching. In addition to improving science, explicit inclusion NOS in curricula helps creation responsible citizenry. Here, we analyze representation aspects curricula, particularly physics syllabi four East African Community (EAC) countries: Burundi, Rwanda, Tanzania, Uganda. These EAC countries have purposively selected because sharing...

Using the reductive perturbation technique, propagation characteristics of ion-acoustic double layer in a spatially inhomogeneous plasma have been investigated. We derived modified Korteweg-de Vries (mKdV) equation with varying coefficients for an two Maxwellian electron species. The solution mKdV is discussed detail. present analysis shows that density n0 does not affect amplitude layer, ϕm, whereas its width and velocity are found to decrease as it propagates higher region. It peak...