ISSN:0002-9505    

DOI:10.1119/1.13908

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.4755900

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

This Resource Letter provides a guide to the literature on plasma waves and instabilities. Approximately 50% of the references are on linear waves, 25% on nonlinear waves, and 25% on applications. After each reference is a two‐letter code. The first letter indicates the level of the material. The letter E after an item indicates elementary level or material of general interest to persons becoming informed in the field; the letter I, for intermediate level, indicates material of a somewhat more specialized nature; and the letter A indicates rather specialized or advanced material. The second letter indicates the type of material, and is either T (tutorial), R (review), B (benchmark), or H (historical). An asterisk (*) in front of an item indicates those articles to be included in an accompanying reprint book. These are primarily benchmark papers. Material from in‐print books and review series, as well as most review articles, have been excluded because of page limitations.

ISSN:0002-9505    

DOI:10.1119/1.13910

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

The most obvious evidence supporting the Copernican theory emerged during a period of 300 years following the publication ofDeRevolutionibusby Copernicus in 1543. In this paper a comparison is made between the geo‐centric and helio‐centric theories on the basis of astronomical merit and observational evidence available in 1543. The Copernican theory is not superior on the basis of calculational accuracy, but does possess greater unity and is simpler in the sense thatad‐hocassumptions required by the geo‐centric theory are not required by the Copernican theory. The Copernican theory, however, requires anad‐hocassertion about the size of the universe in order to explain the absence of observed stellar parallax.

ISSN:0002-9505    

DOI:10.1119/1.13911

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

In any transformer the Poynting vectorE×Hpoints away from the primary winding into the field, and from the field into the secondary winding. The Poynting vector results from the superposition of theE=−∂A/∂tfield associated with the changing magnetic flux and theHfields of the currents in the windings.

ISSN:0002-9505    

DOI:10.1119/1.13912

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

A method of producing computer graphics for quantum mechanics has been adapted to portray processes with much shorter wavelengths in comparison to those in an earlier work by Chen. A set of pictures are produced which demonstrates the correspondence principle—that quantum mechanics reduces to classical mechanics in appropriate limits.

ISSN:0002-9505    

DOI:10.1119/1.13774

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

Identical motion for classical and quantum mechanics is re‐examined in order to include the effects of energy‐dependent potentials in the equations of motion. Only free particles permit such motion.

ISSN:0002-9505    

DOI:10.1119/1.13913

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

Starting with the generally covariant Dirac equation we give equations showing that the spin of the Dirac particle couples directly with the background gravitational field. By restricting the metric to one describing a general 3‐space metric (no gravitation) we reduce the spin‐covariant Dirac equation to a two‐component theory. Finally, the general form for the Pauli–Schrödinger equation is derived for any 3‐space orthogonal curvilinear system of coordinates.

ISSN:0002-9505    

DOI:10.1119/1.13914

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

An experiment is presented that investigates quantitatively the transition of a sphere from rolling with no slipping to a combination of rolling and slipping. Students tend to find their data surprising; however, an application of the laws of rotational dynamics correctly predicts the observed behavior. The experiment is suitable for an introductory mechanics laboratory.

ISSN:0002-9505    

DOI:10.1119/1.13915

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

The work done by frictional forces has usually been calculated incorrectly. The key to a correct treatment lies in making a careful distinction between a purely mechanical integral of Newton’s second law on the one hand and the first law of thermodynamics on the other. These two equations are the same for point particles but differ for deformable systems, which include systems subject to sliding friction. A model‐independent calculation is supplemented by applications to current models for friction. Heat transfer is treated in detail for the case of lubricated friction. Rotational friction is analyzed. An invariant form of the energy equation is presented.

ISSN:0002-9505    

DOI:10.1119/1.13775

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP