NotesFAQContact Us
Collection
Advanced
Search Tips
Laws, Policies, & Programs
What Works Clearinghouse Rating
Showing 346 to 360 of 545 results Save | Export
Newell, Homer E. – 1967
This booklet contains material prepared by the National Aeronautic and Space Administration (NASA) office of Space Science and Applications for presentation to the United States Congress. It contains discussion of basic research, its value as a source of knowledge, techniques and skills that go into the development of technology, and practical…
Descriptors: Aerospace Technology, Astronomy, Biological Sciences, Earth Science
Bearden, Thomas E. – 1975
This document presents a discussion of the postulated mechanism that leads to the materialization and dematerialization of matter and to antigravity. The mechanism also explains why an orbital electron does not radiate energy, in contradiction to classical electromagnetic theory. One of the paradoxes of special relativity is explained. A new model…
Descriptors: Atomic Theory, Models, Physical Sciences, Physics
Allardice, Corbin; And Others – 1968
This booklet is one of the "Understanding the Atom" Series. Consisting of three sections, it is an account of the development of the first nuclear reactor by a team of scientists led by Enrico Farmi. The first section briefly reviews the early work on nuclear fission and neutron emission, the impact of Einstein's letter to President…
Descriptors: Atomic Theory, Energy, Nuclear Physics, Physics
Peer reviewed Peer reviewed
Remillard, Wilfred J. – American Journal of Physics, 1978
Studies the relationship between Eulerian and Lagrangian coordinate systems with the help of computer plots of variables such as density and particle displacement. Gives examples which illustrate the differences in the shape of a traveling wave as seen by observers in the two systems. (Author/GA)
Descriptors: Algorithms, College Science, Diagrams, Higher Education
Peer reviewed Peer reviewed
Van Horn, Hugh M. – Physics Today, 1979
Describes the current understanding of the structure and evolution of the white dwarf stars that was gained as a result of the increasingly sensitive and detailed astronomical observations coupled with calculations of the properties of matter under extreme conditions. (Author/GA)
Descriptors: Astronomy, College Science, Higher Education, Light
Peer reviewed Peer reviewed
McDaniel, Suzanne T. – American Journal of Physics, 1979
A simplified derivation of the parabolic approximation to the acoustical wave equation is presented. Exact solutions to this approximate equation are compared with solutions to the wave equation to demonstrate the applicability of this method to the study of underwater sound propagation. (Author/BB)
Descriptors: Acoustical Environment, Acoustics, Earth Science, Environmental Research
Peer reviewed Peer reviewed
Smith, H. A., Jr.; And Others – American Journal of Physics, 1979
Samples of filtered airborne particulate, collected daily for the first month after the September 18, 1977 Chinese nuclear detonation, showed fourteen fission products. Fluctuations in the daily fallout activity levels suggested a global fallout orbit time of approximately twenty days. (Author/BB)
Descriptors: Air Pollution, Environmental Research, Nuclear Physics, Nuclear Warfare
Peer reviewed Peer reviewed
Turner, J. E. – American Journal of Physics, 1979
This paper presents a derivation of the number given by Fermi in 1925, in his semiclassical treatment of the motion of an electron in the field of two stationary positive charges, for Bohr quantization of the electron orbits when the stationary charges are positive, and applies it to an electron moving in the field of a stationary dipole.…
Descriptors: Atomic Structure, Electricity, Mathematics, Motion
Peer reviewed Peer reviewed
Hinirichsen, P. F. – American Journal of Physics, 1978
Describes an experiment which studies the motion of an irregular Lucite glider on an air table and demonstrates the dynamic properties of the center of mass. (Author/GA)
Descriptors: College Science, Experiments, Higher Education, Instruction
Peer reviewed Peer reviewed
Najita, Kazutoshi; Yuen, Paul C. – Physics Teacher, 1978
Reviews the earthquake phenomenon and its possible relation to ionospheric disturbances. Discusses the basic physical principles involved and the methods upon which instrumentation is being developed for possible use in a tsunami disaster warning system. (GA)
Descriptors: Acoustics, Earth Science, Earthquakes, Electronic Equipment
Peer reviewed Peer reviewed
Miller, Dennis J. – Journal of Chemical Education, 1978
Conflicting views have been put forward on the derivation of the distribution of solubilized molecules among micelles. This stems from failure to consider the arrangement of the solubilized molecules in the micelles. In the treatment presented enthalpy effects are ignored as they are not amenable to a simple general theory. (Author/BB)
Descriptors: Chemical Bonding, Chemistry, Higher Education, Mathematics
Peer reviewed Peer reviewed
Pancheri, Lillian U. – American Journal of Physics, 1978
Pierre Gassendi asserted, and for the first time successfully defended, the notion of an independently real space and time, thus providing seventeenth century physics with its needed philosophical foundation. This paper introduces the reader to Gassendi's work in physics and philosophy and describes some of his relationships to Galileo and his…
Descriptors: Astronomy, History, Mechanics (Physics), Natural Sciences
Peer reviewed Peer reviewed
Lerche, I. – American Journal of Physics, 1977
Discusses Zeeman's experiment of the Fiyea effect for the speed of light in a moving medium and existing measurement errors. (SL)
Descriptors: College Science, Higher Education, Light, Mechanics (Physics)
Farley, Hale – Research/Development, 1978
Describes electronic instruments utilized for measurement in research being conducted to develop laser fusion. (SL)
Descriptors: Energy, Lasers, Measurement Equipment, Physical Sciences
Scientific American, 1978
Reports on the cost of health care, the proposed 1979 science research budget of the federal government, the prospect of coal slurry pipelines, the composition of the Martian moon Phobos, high energy particle physics, north seeking bacteria, and wine making in ancient Egypt. (SL)
Descriptors: Biological Sciences, Budgets, Energy, Federal Government
Pages: 1  |  ...  |  20  |  21  |  22  |  23  |  24  |  25  |  26  |  27  |  28  |  ...  |  37