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Issues

Volume 49, Issue 5
May 1981
American Journal of Physics Cover Image for Volume 49, Issue 5
All Issues
ISSN 0002-9505
EISSN 1943-2909

Letters To The Editor

Physics through games
V. Srinivasan
Am. J. Phys. 49, 391 (1981) https://doi.org/10.1119/1.12683
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Postcomputer era–already?
A. Douglas Davis
Am. J. Phys. 49, 391 (1981) https://doi.org/10.1119/1.12684
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Letter to the Editor
Luis de la Peña
Am. J. Phys. 49, 391 (1981) https://doi.org/10.1119/1.12685
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Papers

Resource letter BH‐1: Black holes
Steven Detweiler
Am. J. Phys. 49, 394–400 (1981) https://doi.org/10.1119/1.12686
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An elementary formalism for general relativity
Andrea A. diSessa
Am. J. Phys. 49, 401–411 (1981) https://doi.org/10.1119/1.12687
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Acceleration of a static observer near the event horizon of a static isolated black hole
Noel A. Doughty
Am. J. Phys. 49, 412–416 (1981) https://doi.org/10.1119/1.12688
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Evolution of the Two Cultures controversy
Ronald J. Bieniek
Am. J. Phys. 49, 417–424 (1981) https://doi.org/10.1119/1.12689
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Falsification by space charge of electron beam energy measurements
Robert N. Varney
Am. J. Phys. 49, 425–428 (1981) https://doi.org/10.1119/1.12690
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Modified Bohr quantization of charmonium
Brian Sheehy; Hans C. von Baeyer
Am. J. Phys. 49, 429–431 (1981) https://doi.org/10.1119/1.12691
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Simplified version of Dirac’s extensible model of the electron
T. Fliessbach
Am. J. Phys. 49, 432–434 (1981) https://doi.org/10.1119/1.12692
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Maxwell’s relations for a van der Waals gas and a nuclear paramagnetic system
James Herlihy; Carol Michelson; Mercedes Prieto; Jonathan Ruth; William A. Barker
Am. J. Phys. 49, 435–438 (1981) https://doi.org/10.1119/1.12693
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Inexpensive photovoltaic solar radiometer
Fritz Kissner
Am. J. Phys. 49, 439–442 (1981) https://doi.org/10.1119/1.12694
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Proposal regarding a new general physics program for geologists
A. M. Conforto; F. Menzinger
Am. J. Phys. 49, 443–446 (1981) https://doi.org/10.1119/1.12695
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Guided electromagnetic waves: A geometrical development
J. R. Cleveland
Am. J. Phys. 49, 447–449 (1981) https://doi.org/10.1119/1.12696
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Electric fields and charge distributions associated with steady currents
C. A. Coombes; H. Laue
Am. J. Phys. 49, 450–451 (1981) https://doi.org/10.1119/1.12697
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Motion of the Earth as viewed from the moon and the Y‐suspended pendulum
A. D. Crowell
Am. J. Phys. 49, 452–454 (1981) https://doi.org/10.1119/1.12477
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Stable solutions using the Euler approximation
Alan Cromer
Am. J. Phys. 49, 455–459 (1981) https://doi.org/10.1119/1.12478
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Reversible energy converter
N. C. Barford
Am. J. Phys. 49, 460–465 (1981) https://doi.org/10.1119/1.12479
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Walsh transforms
Tom Beer
Am. J. Phys. 49, 466–472 (1981) https://doi.org/10.1119/1.12714
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Towards an impressionist picture of the history of astronomy
L. M. Celnikier
Am. J. Phys. 49, 473–476 (1981) https://doi.org/10.1119/1.12480
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Supplementary Material
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Listening to the Doppler shift of visible light
R. E. Crandall; E. H. Wishnow
Am. J. Phys. 49, 477–478 (1981) https://doi.org/10.1119/1.12481
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Compensated RC integrators
Rodney C. Cross; George A. Collins
Am. J. Phys. 49, 479–480 (1981) https://doi.org/10.1119/1.12482
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Classical limit for the ground‐state energy
F. M. El‐Batanouny
Am. J. Phys. 49, 481–482 (1981) https://doi.org/10.1119/1.12483
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Teaching kinematics with electronic equipment
J. Maria Vega Fernández; J. José Peña Bernal; M. Angeles Rossell Bueno; Manuel Gálvez Delgado; Benito Mahedero Balsera
Am. J. Phys. 49, 483–488 (1981) https://doi.org/10.1119/1.12484
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Dulong–Petit law in a van der Waals theory of the crystalline state
M. de Llano; S. Ramírez; H. Vucetich
Am. J. Phys. 49, 489–490 (1981) https://doi.org/10.1119/1.12485
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Cartan’s rule in particle optics
Gian Antonio Salandin; Mario Vascon
Am. J. Phys. 49, 491–492 (1981) https://doi.org/10.1119/1.12486
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Notes and Discussions

Derivation of the Lorentz transformation
Alan Macdonald
Am. J. Phys. 49, 493 (1981) https://doi.org/10.1119/1.12487
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Origin of the force on a current‐carrying wire in a magnetic field
W. R. McKinnon; S. P. McAlister; C. M. Hurd
Am. J. Phys. 49, 493–494 (1981) https://doi.org/10.1119/1.12488
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Obtaining L2 and J2 from expectation values of Lz and Jz
John D. McGervey
Am. J. Phys. 49, 494–495 (1981) https://doi.org/10.1119/1.12489
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Comment on ’’Spin and uncertainty in the interpretation of quantum mechanics’’
R. T. Deck
Am. J. Phys. 49, 495–497 (1981) https://doi.org/10.1119/1.12490
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Reply to ’’Comment on ’Spin and uncertainty in the interpretation of quantum mechanics’ ’’
David Hestenes
Am. J. Phys. 49, 497 (1981) https://doi.org/10.1119/1.12491
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Quasianalytic solution to the three‐body, linear, elastic collision problem
Leonard Flansburg; Karl Hudnut
Am. J. Phys. 49, 497–498 (1981) https://doi.org/10.1119/1.12492
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Coriolis acceleration without vectors
J. N. Boyd; P. N. Raychowdhury
Am. J. Phys. 49, 498–499 (1981) https://doi.org/10.1119/1.12493
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Huyghen’s construction and holography
G. L. Rogers
Am. J. Phys. 49, 499–500 (1981) https://doi.org/10.1119/1.12494
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Sliding friction and the harmonic oscillator
C. Barratt; George L. Strobel
Am. J. Phys. 49, 500–501 (1981) https://doi.org/10.1119/1.12495
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A relativistic problem: The charge distribution stability on a conductor
A. Hernández; M. Rivas
Am. J. Phys. 49, 501–503 (1981) https://doi.org/10.1119/1.12496
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Some remarks on a generalized heat conduction equation
V. K. Agarwal
Am. J. Phys. 49, 503–504 (1981) https://doi.org/10.1119/1.12497
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Invariant speed in special relativity
Ajit Mohan Srivastava
Am. J. Phys. 49, 504–505 (1981) https://doi.org/10.1119/1.12498
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Compton effect from a center‐of‐momentum system
Walter Roy Mellen
Am. J. Phys. 49, 505–506 (1981) https://doi.org/10.1119/1.12499
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Apparatus Notes

Buoyant force analog: A demonstration for the vertical stage overhead projector
George Spagna
Am. J. Phys. 49, 507–508 (1981) https://doi.org/10.1119/1.12709
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Reliable and economical circuit IV characterization solar cells
Y. H. Muoy; J. P. Charles; M. Adbelkrim
Am. J. Phys. 49, 508–509 (1981) https://doi.org/10.1119/1.12710
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Book Reviews

Light: Its interaction with art and antiquities
Thomas B. Brill; David S. Falk
Am. J. Phys. 49, 510 (1981) https://doi.org/10.1119/1.12711
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Film Reviews

Mirrors of the Universe: The MMT story (film)
Ted Offret; Tom R. Dennis
Am. J. Phys. 49, 511 (1981) https://doi.org/10.1119/1.12712
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Adventure of the Mind (film)
Children’s Television International Producer; Steve Schroeder
Am. J. Phys. 49, 511–512 (1981) https://doi.org/10.1119/1.12713
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All objects and some questions
Charles H. Lineweaver, Vihan M. Patel
Temperature as joules per bit
Charles Alexandre Bédard, Sophie Berthelette, et al.
Ergodic Lagrangian dynamics in a superhero universe
I. L. Tregillis, George R. R. Martin
Internal ballistics of the sling
Mark Denny
The right way to introduce complex numbers in damped harmonic oscillators
Jason Tran, Leanne Doughty, et al.
A first encounter with exceptional points in a quantum model
C. A. Downing, V. A. Saroka
  • Online ISSN 1943-2909
  • Print ISSN 0002-9505

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