This article describes the distribution of mass in a hand-held object as a fundamental but unrecognized contributor to the sensation one receives from the object. Experiments producing fractions for human sensitivity are given. (SA)

Presents an exact solution to the nonlinear Faraday's law problem of a rod sliding on frictionless rails with resistance. Compares the results with perturbation calculations based on the methods of Poisson and Pincare and of Kryloff and Bogoliuboff. (Author/GA)

Shows how the good-as-new postulate leads to the exponential function, which in turn leads to a complete probabilistic description of the decay of an aggregate of identical excited atoms. (Author/GA)

Shows how to extend Wigner distribution functions, and Weyl correspondence between quantum and classical variables, from the usual kind of canonically conjugate position and momentum operators to the case of an angle and angular momentum operator pair. (Author/GA)

Explains that the quantal state describes a statistical ensemble of similar systems identically prepared, and is not to be identified with any single system. Shows how to determine empirically the general quantum state by calculations involving only the measured mean values of a set of observables called a "Quorum." (Author/GA)

Discusses recent progress in using tunable lasers to selectively separate substances at the atomic and molecular level. Emphasizes biological applications, such as selective excitation and breaking of hydrogen bonds in DNA. (MLH)

Discusses new laser techniques that make it possible to see optical spectra without Doppler broadening, to label energy levels, and to enhance sensitivity. (MLH)

Presents innovative ideas that have been incorporated into the applied physics program at the Humacao Campus of the University of Puerto Rico since 1981. Describes a program that was designed as a professional (terminal) one with mechanisms to guide students who wish to pursue graduate studies. (Author/YDS)

Demonstrates what theoretical physicists make a rule using juggling. Provides the thinking process and calculating procedure. (YP)

Describes the scientific work of several women, including Marie Curie, Lise Meitner, Ida Noddack, Irene Curie, Marguerite Perey, Chien-Shiung Wu, and Maria Mayer. Discusses the connections between their discoveries. Thirty-six references are listed. (YP)

Described is an overview of the Voyager 2 encounter with Neptune. Discussed are the trajectory, atmosphere, rings, satellites, magnetosphere, and future of Voyager 2. (YP)

In addition to "formal" reference citations in scientific journals, articles also contain further references. The main findings of an examination of non-indexed indirect-collective citedness (NIICC) are presented; two representative, elite physics journals were examined. Further research is needed to reveal the life course and nature of the ICC…

Describes a course based on the scientific approach to the search for extraterrestrial intelligence. Explores the biological and technological aspects of the search and the social implications of possible contact. (Author/CCM)

Observing the relationship of general relativity and the geometry of space-time, the author questions whether the rest of physics has geometrical explanations. As a partial answer he discusses current research on subatomic particles employing geometric transformations, and cites the existence of geometrical definitions of physical quantities such…

Recent research has shown that serious misconceptions frequently survive high school and university instruction in mechanics. It is interesting to inquire whether Newton himself encountered conceptual difficulties before he wrote the "Principia." This paper compares Newton's pre-"Principia" beliefs, based upon his writings,…