A kinetic theory model for rain out and wash out of soluble gaseous air pollutants

A new theory, using kinetic theory of gases, for dissolution of gaseous air pollutants and applicable both for wash out and rain out processes has been proposed. It has been shown that the current theory of wash out of gases given by Hales (1972) is a special case of the general theory proposed here.

Lid-Driven Cavity For Mantle Convection Modelling Using Lattice Boltzmann Method

The Lattice Boltzmann Method is one of the computational fluid dynamics methods that can be applied to simulate fluid based on the microscopic and kinetic theory of gases. In this study, earth mantle convection is simulated by combining the concept of lid-driven cavity simulation and natural convection using the Lattice Boltzmann method in a two-dimensional system (D2Q9). The results of the lid-driven cavity and natural convection simulation are comparable to previous works. This study shows that at a certain lid velocity, the direction of the moving plume is changed. This earth mantle convection simulation will give better and more reliable results by considering more complicated boundary conditions and adequate simulation systems.

Lid-Driven Cavity For Mantle Convection Modelling Using Lattice Boltzmann Method

The Lattice Boltzmann Method is one of the computational fluid dynamics methods that can be applied to simulate fluid based on the microscopic and kinetic theory of gases. In this study, earth mantle convection is simulated by combining the concept of lid-driven cavity simulation and natural convection using the Lattice Boltzmann method in a two-dimensional system (D2Q9). The results of the lid-driven cavity and natural convection simulation are comparable to previous works. This study shows that at a certain lid velocity, the direction of the moving plume is changed. This earth mantle convection simulation will give better and more reliable results by considering more complicated boundary conditions and adequate simulation systems.

A Profile of Scientific Literacy of Senior High School Students on Physics Learning

In physics learning, students need to know the extent to which scientific concepts have been studied. Scientific literacy is the ability to make decisions based on scientific considerations, solve problems and apply the knowledge gained in everyday life. This study aims to scientifically analyse the scientific literacy ability of senior high school students on the kinetic theory of gases. The sample of this research is 90 high school students. Data analysis used descriptive qualitative. The results study show that high school students’ ability was very low, many students did not have scientific literacy ability on physics learning. The implications of this study can be used as empirical evidence that the scientific literacy of senior high school students on physics learning still needs to be improved.

Gases Theory Representation Instrument (GeTRI): A Practical Tool To Analyze Sundanese Students’ Conception in the COVID-19 Pandemic

This research purposes to promote a Gases Theory Representation Instrument (GTRI) as a tool to identify the students’ conception on kinetic theory of gases. The method used in this research was FODEM (Formative Development Methods) model which has three comprehensive steps, which are need analysis, implementation, and formative evaluation. The participants involved in this research were 26 high school students in Sundanese tribe. The students’ responses were analyzed using Rasch model, which involved item reliability, person reliability, validity, difficulty level and students’ conception distributions. Students’ conception were classified into six categories which are Sound Understanding (SU), Partial Positive (PP), Partial Negative (PN), Misconception (MC), No Understanding (NU), and No Coding (NC). Based on the data analysis, it can be concluded that students’ conception are typically in the SU and PP categories. Besides, the Gases Theory Representation Instrument (GTRI) is reliable and valid to identify students’ conception on kinetic theory of gases.

On the Complex-Valued Distribution Function of Charged Particles in Magnetic Fields

In this work, we revisit Boltzmann’s distribution function, which, together with the Boltzmann equation, forms the basis for the kinetic theory of gases and solutions to problems in hydrodynamics. We show that magnetic fields may be included as an intrinsic constituent of the distribution function by theoretically motivating, deriving and analyzing its complex-valued version in its most general form. We then validate these considerations by using it to derive the equations of ideal magnetohydrodynamics, thus showing that our method, based on Boltzmann’s formalism, is suitable to describe the dynamics of charged particles in magnetic fields.

Peningkatan Level Pemahaman Konsep Teori Kinetik Gas Mahasiswa Calon Guru Fisika Melalui Metode Demontrasi Interaktif dengan Bantuan Ragam Media Visual

The research on increasing the level of understanding of the kinetic theory of gases concepts for prospective physics teacher students through interactive demonstration methods with the help of a variety of visual media has been carried out. This study aims to determine the increase in the level of students’ understanding of the kinetic theory of gases concept through interactive demonstration methods with the help of various visual media. The method used was pre-experimental with one group pretest-posttest design. The research subjects were 76 prospective physics teacher students at a university in the city of Makassar, South Sulawesi. The test instrument used was a concept understanding level test in the form of an essay consisted of three questions. The results showed that most of the students reached a complete understanding level of the kinetic theory of gases after attending a basic physics course through interactive demonstration methods with the help of various visual media. Thus, the level of students’ understanding of kinetic theory of gases concept has increased through interactive demonstration methods with the help of various visual media.