Discusses the description of pendulum motion on the Earth's surface utilizing mathematics at the level of average high school students. (SL)

Describes the relationship existing between coefficient of performance (COP) and energy efficiency ratio (EER) in air conditioning units and introduces new efficiency parameters measured relative to the energy extracted from the primary energy source. (SL)

Provides a definition of electric energy density by drawing a circuit analog. (SL)

The observations that would be made by a uniformly accelerated observer, including the observer's event horizon, the variation of clock rates with position, and the effects of following a freely falling object are considered in detail. (SL)

Defines and investigates a moment of inertia tensor for a quantum mechanical wave packet. (SL)

Discusses the information-theoretic statistical mechanics of a system in contact with heat reservoir. (SL)

Reviews the historical development of concepts of motion from the time of Aristotle to Newton. (SL)

Describes experiments simulating the mechanics of the human elbow and back. (SL)

Presents a historical anecdotal account of the quantum mechanical idea of tunneling. (SL)

Presents results of analyses of flat and conical depressed target surfaces used in a bouncing ball experiment. (SL)

Discusses Hertz vector potentials and demonstrates their application to the calculation of electric and magnetic dipole radiation and to the propagation modes of a rectangular waveguide. (Author/SL)

Outlines a problem concerning the computation of hydrogen spectral line wavelength in a general physics class which is appropriate for computations on calculators with 8 significant digits of accuracy. (SL)

Describes four experiments in mechanics which utilize a tennis ball serving machine. (SL)

Presents part two of a two-part article describing the Kelvin-Thomson atom. This part discusses the arrangement of electrons within the atom and examines some of the properties predicted for elements in the Kelvin-Thomson model. (SL)

Scientists often use the "slingshot effect" (also called the "gravity assist") of the gravitational field of a planet to increase or decrease the velocity of a spacecraft. Examples of this effect, puzzling aspects, a qualitative explanation, details of necessary calculations, a thermodynamic analogy, and other topics are discussed. (JN)