Compares neutrino and photon emissions, develops the thermodynamic blackbody laws of neutrino emission analogous to laws governing photon emission, points out that combined radiation from a "true blackbody" consists of both photon and neutrino emissions of comparable magnitude, and speculates upon the existence of blackbody neutrino…

Introducing a four-vector strain and a four-force stress, Hooke's law is written as a four-vector equation. This formulation is shown to clarify seemingly paradoxical results in connection with uniformly accelerated motion, and rotational motion with angular acceleration. (Author/JN)

Demonstrates that the observed path of a particle in quantum mechanics is a fractal curve with Hausdorff dimension two. (Author/JN)

Simple and efficient methods for adding angular momenta and for finding angular momentum eigenstates for systems of equivalent electrons are developed. Several different common representations are used in specific examples. The material is suitable for a graduate course in quantum mechanics. (SK)

Explains some developments in the teaching of special relativity theory, and discusses some ideas that are basic to the understanding of the theory. (GA)

Discusses the extraordinary potential, the technical difficulties, and the financial problems that are associated with research and development of fusion power plants as a major source of energy. (GA)

Some topics included are: the relative merits of a programmable calculator and a microcomputer; the advantages of acquiring a sound-level meter for the laboratory; how to locate a virtual image in a plane mirror; center of gravity of a student; and how to demonstrate interference of light using two cords.

Explains how to demonstrate the following: the hysteresis effect and the existence of domains in Rochelle salt (sodium potassium tartrate); diffraction experiments using a slide with multiple slits; and an analogue technique for learning terminal velocity. (GA)

Shows that the elementary ballistic range problem solution, when scaled by the reciprocal of the eccentricity, contains in itself a good description of the more general Keplerian ballistic problem. (Author/GA)

Describes and explains some aspects of the motion of a top, the extreme end of which is made round, spinning on surfaces provided with friction. (Author/GA)

Discusses the hypothesis studied by astrophysicists on the symmetry between matter and anti-matter in the composition of the universe. (HM)

Examines the relationship between the molecular field theory of ferromagnetism and elementary catastrophe theory in order to provide an introduction to the ideas of catastrophe theory. (Author/GA)

Supersymmetry is a newly developed principle with which theorists are attempting to continue the work of unification. This article examines the principle of supersymmetry at the subatomic level and relates it to the quest for a unity theory. (MA)

Shows how to use the Ritz method for obtaining approximate solutions to problems expressed in variational form directly from the variational equation. Application of this method to classical mechanics is given. (MLH)

Presents Galileo's case against Aristotle's description of freely falling bodies, and discusses possible alternative interpretations of Aristotle's view. (MLH)