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Table of Content
20 May 2006 Volume 25 Issue 5
著者文摘
How to select the basic physics experiments
. 2006, 25(5): 1-1.
Abstract
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863
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887
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The selecting principle of basic physics experiments is discussed. Some new basic physics experiments are suggested.
The effects of tidal force on the orbit planes of the Moon and satellites
. 2006, 25(5): 4-4.
Abstract
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809
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(220KB) (
1152
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The effects of tidal force on the orbit planes of the Moon and satellites are discussed. The relative error of the result calculated is 3.8 %.
Comparative analysis of dispersion law of lattice vibration with that of the longitudinal vibration of a uniform bar
. 2006, 25(5): 7-7.
Abstract
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789
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(216KB) (
369
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The equation of lattice vibration of one-dimensional monatomie lattice and the equation of longitudinal vibration of a uniform bar are discussed. Raplaeing the spatial derivatives by spatial differences in the equation of the latter, we get the equation of the former. The dispersion laws of the two systems are compared. The Brillioun zone of discrete system is intimately connected with the interpartiele distance. With the changing of mass distribution from diseretization to continuum, the dispersion law of the lattice vibration changes to that of the longitudinal vibration of a uniform bar.
Velocity operator and Zitterbewegung of electron
. 2006, 25(5): 10-10.
Abstract
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791
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(149KB) (
546
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The concepts of velocity operator and Zitterbewegung in some foreign textbooks in quantum mechanics are criticized and the origin thereof is analyzed.
The velocity, acceleration and time of particle sliding down on a horizontally free cancave surface
. 2006, 25(5): 12-12.
Abstract
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806
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(247KB) (
662
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The velocity, acceleration and time of a particle sliding down along a horizontally free concave surface are discussed. And correlative formulas are deduced. Detailed calculations are done for several typical examples, in which the intersection line between the concave surface and the motion plane of the particle are straight line parabola, and ellipse, respectively.
The collision of particle and a homogeneous free bar
. 2006, 25(5): 16-16.
Abstract
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1190
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(211KB) (
662
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The physical rule of the collision of a particle and a bar is discussed, the energy relation in completely inelastic collision is cleared, and it is turned out that the two bodies not necessarilly move together after completely inelastic collision.
A way forming an elliptical pendulum
. 2006, 25(5): 18-18.
Abstract
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1491
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(219KB) (
531
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A particle moving freely in a circular concave trough of a block on a smooth horizontal plane forms an elliptical pendulum, and the period thereof is calculated easily.
Study on forced oscillation pattern of A2B model
. 2006, 25(5): 21-21.
Abstract
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721
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(289KB) (
529
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The equations of forced oscillation of tri-atom molecule truss system——A2B dynamics is solved, and using Maple program its vibration image of the accounting case is analyzed, finally the forced oscillation pattern of A2B Model is proposed.
The role of ideal gas in thermodynamics
. 2006, 25(5): 24-24.
Abstract
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856
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(146KB) (
389
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The theory of thermodynamics is universal, it is independent of ideal gas. Ideal gas offers a simple example of application and a simple thermometer for thermodynamic scale of temperature.
Redlich-Kwong equation
. 2006, 25(5): 26-26.
Abstract
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1182
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(144KB) (
365
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The accuracy of Redlich-Kwong equation is the top one among equations of gas state that include two constants, and the related knowledge can be introduced in ＂Basic Physics＂ course.
The improvement of experiments on the module of shear and moment of inertia
. 2006, 25(5): 28-28.
Abstract
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821
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(276KB) (
639
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A new suspender is designed to improve the experiments on the module of shear and moment of inertia. This multifunctional experimental instrument not only measures the module of shear of mental thread and the moment of inertial of rings and poles, but also validates the parallel axis theorem and perpendicular axis theorem to reflect the important properties of moment of inertia.
Improvement on experiments of overweight and weightlessness
. 2006, 25(5): 32-32.
Abstract
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1009
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(213KB) (
773
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The indicator of the traditional demonstration experiment of the ＂overweight＂, ＂weightlessness＂ is difficult for the student to see clearly and read it. And it is disadvantageously to the students to understand overweight and weightlessness. In improvement experiment, the indicator is static in overweight （or weightlesshess） position. The students can accurately read out the number of degree, as soon as they compare it with the ob）ect actual gravity. So they can obtain the concept of ＂overweight＂ or ＂weightlessness＂.
An analysis of factors that impact maximum self-induced EMF in open RL circuit
. 2006, 25(5): 34-34.
Abstract
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1003
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(361KB) (
429
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A theoretical analysis is presented for the factors influencing maximum self-induced EMF in transient process in RL circuit. Then it is verified experimentally by various apparatus and scheme.
A group of experiments of metal film preparation and physical property measurement
. 2006, 25(5): 39-39.
Abstract
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780
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PDF
(329KB) (
881
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A group of experiments of metal film preparation and physical property measurement, consisting of vacuum experimefit, metal film preparation, film thickness measurement, film resistivity measurement and film resistance dynamic measurement experiments, were developed to attempt rearch based teaching in the general physical experiment course. These experiments have close relationship with modern science and technology. The equipments are reliable and easy to be operated, suitable to rearch based teaching in the general physical experiment course.
A discussion on progress of optics through Nobel Prize in physics
. 2006, 25(5): 42-42.
Abstract
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928
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(436KB) (
996
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The progress and development of optics are analyzed and discussed from a new point of view, and the progress of optics in future is looking forward to.
The important influence of Einstein to the development of the quantum theory
. 2006, 25(5): 48-48.
Abstract
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1117
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(429KB) (
650
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Tracing back the formation and perfection of the early quantum theory to the current quantum mechanics theory by combining the special historical background concerning the development of the quantum theory of the 20^th century,the article discusses the extraordinary work done by Einstein in the aspect of quantum mechanics is discussed. It is also pointed out that Einstein played an important role in different periods in the development of the quantum theory,thus producing an impact over the study of quantum theory and advancing the development of quantum mechanics.
The initial education reform of general physics for the medical undergraduates
. 2006, 25(5): 53-53.
Abstract
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702
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(329KB) (
604
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For the medicine science undergraduates, we have tried a series of initial reformation in general physics teaching, and gained some experiences. The reform is strengthened on undergraduates＇ interest promotion, concept adjusting. We also try to apply new methods and means to improve the teaching level.
A solution to Zeno paradox
. 2006, 25(5): 56-56.
Abstract
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1008
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(268KB) (
453
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The general Zeno paradox refers to a bird flying back and forth between two face-to-face moving carts. The bird is finally located at the position where the two carts meet, and this final position is independent of where the bird initially is. Hence, it is concluded that for its reversed course, i.e. the bird starts moving in its final position while the two carts go in a back-to-back way, the bird would not necessarily return back to its initial position at the end. In this work, we analyzed this paradox related process by building physical models based on the motion laws, and solved this problem.
Potential profiles due to the charges distributed in space of columnar regions
. 2006, 25(5): 60-60.
Abstract
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892
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PDF
(302KB) (
359
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The electric potentials given rise by the charges even distributed in space of pillar regions are calculated by means of the superposition principle of electric potentials. Here we regard the charges distributed in an infinite line as a ＂source charge＂ in two-dimensional plane and consider the charges distributed in pillar regions as assembly of the ＂source charges＂. In complicated cases, the charge distributions can not be expressed by two-dimensional analytic functions, the electric potential may be calculated with computer easily. The characteristics of the electric potentials corresponding to different charge distributions are displayed.
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