AAPT Logo
AJP Logo
 
   
 

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue

Dec 1956

Volume 24, Issue 9, pp. 595-636

back to top
RSS Feeds

Thermodynamic Theory of Irreversible Processes. III. The Potentials of Electrochemical Cells in Gravitational and Centrifugal Fields

Donald G. Miller

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 595

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
Using the thermodynamic theory of irreversible processes, a general equation is derived for the solution potential of a multicomponent fluid containing both charged and uncharged species situated in a gravitational or centrifugal field. The argument fully takes into account the irreversible processes of sedimentation and diffusion, and it is shown rigorously how the Hittorf transference numbers of ions and nonelectrolytes enter into the expression. The cell emf is derived and specialized for three cases of experimental interest; the concentration cell with transference, the homogeneous solution in the field cell, and the sedimentation equilibrium cell. These equations are applied to three common electrode systems with a single binary electrolyte in a single neutral solvent.

Correlation between Grades in Engineering Physics and Performance in Engineering Curricula

Donald Hoyt, Louis D. Ellsworth, and Robert Katz

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 605

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
A survey of grades in Engineering Physics I at Kansas State College showed that the inner structure of the course was highly consistent. The correlation coefficient between the average of the first three tests and the final grade was about 0.88. More significantly, valuable prognostic data could be obtained from the final grade in the course. The correlation coefficient between the Engineering Physics I grade and the final grade point average of students who completed the course was about 0.83. Only 21% of the students initially failing the course successfully completed an engineering degree, while about 75% of the A, B, and C students eventually graduated from an engineering curriculum.

Interference in an Optical Wedge

Uri Oppenheim and Joseph H. Jaffe

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 610

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
Many standard textbooks treat interference in an optical wedge quite inadequately. Elementary treatments of this problem often leave much confusion about the exact conditions under which the fringes are formed and observed. Here a unified introductory treatment is presented both for two-beam and multiple-beam interference. Special attention is given to the localization of the fringes around the wedge. Factors governing the fringe visibility are examined.

Some Current Problems and Needs in Science Education

Bowen C. Dees

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 616

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
Some of the current problems in science education (principally at the secondary school level) are discussed, and several possible methods of ameliorating present conditions are mentioned. The danger of “over-professionalizing” science instruction—to the detriment of the contribution science can make to the education of the nonscientist—is emphasized.

Measurements on the Kerr Electro-Optical Effect

Myron A. Jeppesen

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 623

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
An experiment is described in which an inexpensive, commercially available cell is used. Values of the Kerr constant for nitrobenzene determined by this method are given for the spectral range from 4600 A to 8800 A.

Dynamical Principle for Classical Mechanics

P. Stehle

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 626

Online Publication Date: Jul 2005

Full Text: | Download PDF

Show Abstract
The dynamical principle underlying nonrelativistic classical particle mechanics is stated in a way which brings it into exact analogy with the quantum principle. The classical equations of motion for a dynamical variable are then displayed in forms analogous to the Schrödinger, Heisenberg, and interaction forms in quantum theory.
back to top
RSS Feeds

Note on an Artificial Satellite

B. Saelman

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 630

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable

Modification of the Franck-Hertz Experiment

R. A. Bernheim, A. C. Gossard, and R. V. Pound

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 630

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable

Effect of Fringing Field on Capacitance and a Measurement of ϵ0

R. A. Kromhout and W. G. Moulton

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 631 | Cited 1 time

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable
back to top
RSS Feeds

History or Legend?

Waldemar Noll

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 632

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable

Conical Pendulum

James A. Richards, Jr.

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 632

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable
back to top
RSS Feeds

Kentucky Section

Carl E. Adams

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 633

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable

Kentucky Section

Carl E. Adams

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 634

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable
back to top
RSS Feeds

Analytical Laboratory Physics

John P. Nickol, Author, Harry F. Meiners, Author, Kenneth H. Moore, Author, Walter Eppenstein, Author, and W. C. Kelly, Reviewer

American Journal of Physics -- December 1956 -- Volume 24, Issue 9, pp. 635

Online Publication Date: Jul 2005

Full Text: | Download PDF

Abstract Unavailable
Close

AAPT on:

close