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Investigation and the Improvement Strategy of the Inquiry Physics Experiment Teaching in Senior High School
Cuixia Zhang,
Huanxia Wang,
Yu Liu,
Jiqiang Jiang
Issue:
Volume 6, Issue 5, September 2018
Pages:
104-114
Received:
11 September 2018
Accepted:
26 September 2018
Published:
25 October 2018
Abstract: In accordance with the international trend, the new round of curriculum reform of basic education in China vigorously advocates inquiry teaching. Experiment plays an important role in physics. However, experiments have not been paid much attention in the past, so it is necessary to analyze how to carry out inquiry experiment teaching and investigate the current implementation status of inquiry-based experiment teaching. In this paper, literature research and questionnaire survey are conducted to investigate the students from the aspects of implementation conditions, implementation intention, implementation process and implementation effect of the inquiry physics experiment teaching. The results show that the present situation of physical inquiry experiment teaching is not optimistic. Although the overwhelming majority of students have positive intention to carry out the physical inquiry experiment, there are many problems in the implementation condition, implementation process and implementation effect of the physical inquiry experiment teaching. And it is in some degree trapped in the practical dilemma of formalism, which needs further improvement and perfection. Therefore, in order to promote the further optimization of exploratory experimental teaching, it is firstly suggested to provide multiparty support for the effective implementation of exploratory experiment teaching. Then, the operational examination is considered to be added in high-interest examinations. Finally, the physics teachers need to improve their professional quality.
Abstract: In accordance with the international trend, the new round of curriculum reform of basic education in China vigorously advocates inquiry teaching. Experiment plays an important role in physics. However, experiments have not been paid much attention in the past, so it is necessary to analyze how to carry out inquiry experiment teaching and investigat...
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To the Theory of Low-Dimensional Hydrogen Molecules
Issue:
Volume 6, Issue 5, September 2018
Pages:
115-127
Received:
6 September 2018
Accepted:
5 October 2018
Published:
9 November 2018
Abstract: Using analytical and numerical methods, the possibility of existence of the elongated and flat hydrogen molecules H2 is first analyzed by analogy with the possibility of existence of low-dimensional single- and two-electron atoms previously proved theoretically (including us) and the impossibility of existence of the same multi-electron atom first pointed out in one of our previous works. In principle, conclusions of the present work can be verified experimentally, since low-dimensional, that is, one- and two-dimensional atoms were obtained experimentally long time ago. In our opinion, the material presented in the Appendix is of independent methodical interest because of its possible inclusion in traditional courses of quantum mechanics.
Abstract: Using analytical and numerical methods, the possibility of existence of the elongated and flat hydrogen molecules H2 is first analyzed by analogy with the possibility of existence of low-dimensional single- and two-electron atoms previously proved theoretically (including us) and the impossibility of existence of the same multi-electron atom first ...
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Realistic Simulations of Non-Linear Acceleration of the Rocket in the Air
Issue:
Volume 6, Issue 5, September 2018
Pages:
128-132
Received:
15 October 2018
Accepted:
31 October 2018
Published:
29 November 2018
Abstract: The motion of the object in the medium has always been a hot research topic, and it is closely connected with many applications in our life. The acceleration of the object with multiple forces becomes very complicated, especially when these forces depend on the motion of the object. The exact formula for the object motion is a differential-integral equation and is very difficult to be solved analytically. One example of this kind of motions is the rocket launch. With sufficient thrust, the rocket can obtain an acceleration large enough to escape from the gravity of the earth. With the increasing height, the gravity from the earth becomes smaller, which affects the net acceleration of the rocket. Meanwhile, the air resistance becomes more and more important when the velocity of the rocket increases. It even plays the main role in the middle stage of the launch. Also, as the air resistance depends on both the velocity of the rocket and the air density (there is no air resistance in vacuum), the air resistance will decrease when the air density becomes small enough at the large height. In this article, a model that includes all of the factors mentioned above is established, and how these forces change the velocity of the rocket is analyzed. Two scenarios, one with air resistance and one without, are described. The velocity of the rocket in each scenario is represented by graphs, which are compared. With justification, the Taylor series is used to solve the differential-integral equation, and it is found that the fuel thrust and the gravity become important in the rocket launch at the beginning stage. In the middle stage, the air resistance begins to have a significant effect and reduces the acceleration of the rocket. In the final stage, there is virtually no gravity or air resistance, and only the fuel thrust contributes to the acceleration of the rocket.
Abstract: The motion of the object in the medium has always been a hot research topic, and it is closely connected with many applications in our life. The acceleration of the object with multiple forces becomes very complicated, especially when these forces depend on the motion of the object. The exact formula for the object motion is a differential-integral...
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Advanced Physics of Thermoelectric Generators and Photovoltaic Cells
Issue:
Volume 6, Issue 5, September 2018
Pages:
133-141
Received:
4 October 2018
Accepted:
22 October 2018
Published:
3 December 2018
Abstract: The measured efficiencies of modern photovoltaic solar cells that exceed the limit determined by Shockley and Queisser indicate a need for advanced physics to solve such conflict. Similarly, the duality confusion represents another conflict that acquires new physics. Such conflicts and confusions were recently solved by using an innovative definition of the nature of electric current as electromagnetic waves of electric potential. This definition was used to find also plausible physical explanation of the results of Tesla’s experiment of transmission of electric power in space and the success of Faraday in polarizing light by electric field in one of his experiments. Additionally, literature failed to find plausible physical explanation of estimating the electric potential of the output electric current from thermopiles and thermoelectric generators as the sum of electric potentials gained in crossing the junctions of these devices. It is shown in this paper that the introduced nature of electric current leads to advanced and plausible physical explanation of such results. It is shown also in this paper that the electric potential of the output electric current from multijunction photovoltaic cells can be estimated, similar to the thermopiles and TEG, as sum of electric potentials gained in crossing the junctions of these cells. Such similarity between the relations applied in estimating the gained potentials in all these multijunction-devices in addition to the relation found by Goldsmid and Sharp between the Seebeck coefficient and the energy bandgap prove that the Photovoltaic effect and the Seebeck effect corresponds simply to the same phenomenon. In other words; the gained potential in photovoltaic cells is generated by the thermal potential of the incident radiation and the difference of the Seebeck coefficients of the materials of its junctions. Such advanced physics may represent a gateway to understand other phenomena in the nature.
Abstract: The measured efficiencies of modern photovoltaic solar cells that exceed the limit determined by Shockley and Queisser indicate a need for advanced physics to solve such conflict. Similarly, the duality confusion represents another conflict that acquires new physics. Such conflicts and confusions were recently solved by using an innovative definiti...
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