An example of the interactive teaching test is presented. As tasks in investigation we consider the classical tasks of general physics from mechanics. The structure of the teaching test is suggested. Some examples of teaching tips are given.
Show AbstractIn the paper it is investigated the role of the Boltzmann kinetic equation in the process of formation of the problem of the foundation of statistical mechanics. The main aspects of this problem, as well as its current state, are presented. There is considered the activity of N.N. Bogolyubov on solving questions related to the foundation of statistical mechanics.
Show AbstractThe experience of organizing independent work of students in the framework of the course "General issues of teaching physical and mathematical disciplines" is discussed. Examples of tasks that were offered to students for independent work are considered. The results of students' assignments are analyzed.
Show AbstractThe problem of poor knowledge of experiments by schoolchildren confirming the main provisions of modern physics is considered. A physics course for grades 10-11 is proposed, the main core of which is the analysis of the change in three scientific paradigms: ancient, classical and modern. The course is not in the strict sense the history of physics, since it is developed not so much in the historical, so much in the logical aspect of the development of basic physical theories and does not always coincide with the chronology. Schoolchildren trace the development of knowledge about nature by studying experiments and theories arising from them. The material is fixed by solving the main types of problems. The course covers all sections of school physics studied in grades 10-11. A similar approach can also be used in a university course of general physics.
Show AbstractThe paper presents a method for visual analysis of photographs of a wave multilayer cloud. It is shown that the cloud is located in the crest of orographic waves above the main ridges of the Crimean mountains. It is shown that the spatial characteristics of the cloud correspond to the results of calculations based on the previously created nonlinear model of the flow around mountains.
Show AbstractThe heat capacity of a liquid is investigated in the paper. For this, the cell-cluster expansion for the free energy is used, taking into account three-particle clusters, inclusive. A system was chosen as the reference one, the potential of interaction between particles of which is a generalization of the Weeks-Chandler-Andersen potential for the case of effective consideration of not only the influence of nearest neighbors, but also of particles on other coordination spheres. The calculations performed for liquid argon showed good agreement between the theoretical results and experimental data.
Show AbstractIn this work, the microwave absorbing and resonance properties of solid solutions based on BiFeO3 and Pb(Fe0.5Nb0.5)O3 modified with GeO2 have been studied. The choice of these systems is justified by the high microwave absorbing properties of the components separately and the prospects of their applications in microwave technology. A method for studying cylindrical material samples on a microstrip line using a network analyzer is briefly described. The measurements were carried out in the frequency range of 300 kHz - 26.5 GHz. For measurements, 3 series of samples were prepared using different process conditions, 3-5 samples in each. This was necessary for collecting statistics. Studies have shown that with an increase in the porosity of the material, its radio-absorbing properties increase. In addition, the height of cylindrical samples does not qualitatively affect their properties, which will greatly facilitate the preparation of new samples for research. Materials with a high concentration of lead ferroniobate have high radio absorbing properties. The results obtained will help in the development of materials with controlled microwave absorbing properties for applications as microwave absorbing coatings, microwave substrates, resonator and filter materials.
Show AbstractThe phase transformation austenite-martensite can be considered as a homogeneous deformation, as a result of which a sphere of unit radius turns into an ellipsoid of deformation. A method for determining the position of the habitus plane based on the analysis of the curvature of the spatial curve of the intersection of the sphere and the deformation ellipsoid is proposed. The algorithm includes finding the coordinates of the point of minimum curvature by numerical methods, determining the position of the straightening plane at the specified point, and the coordinates of the center of curvature. The vector "center of curvature – the point of minimum curvature" defines the normal to the habitus plane. Comparison of the calculated values of the invariant plane indices with the experimental ones showed satisfactory agreement for a number of alloys. It is possible that the deviation of the calculated data from the experimental data for some alloys is due to the need to take into account the deviation from the orientation relationship in the process of martensite transformation.
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