Discusses topics such as streamlined flow, turbulent flow, velocity profiles, and drag reduction as background information for the consideration of the use of drag reducing agents. (GS)

Summarizes some thoughts of Stephen W. Hawking who proposes that certain kinds of communications across the event horizon are possible, that they lead to the evaporation or explosion of the black hole, and, therefore, that classical or quantum mechanical causality has no meaning. (GS)

Examines the gravitational effects and the way that local conditions interact with these effects to produce the tides characteristic of the British seas. Presents some effects of tides including the possibility of harnessing tidal energy and the effect of tidal friction on the use of the earth as a clock. (GS)

Outlines the stages of the nuclear fuel cycle where routine radiation releases occur and where nonroutine releases could occur. Examines the impact of these occurrences and emphasizes the regulations, practices, and technologies that prevail in the United States. (Author/GS)

Attempts to show the feasibility of an energy conservation policy based on a greatly improved efficiency of use of energy. Considers efficiency in the industrial, residential, commercial, and transporation sectors. (GS)

Describes the present distribution of solar energy, traces its use through history, explores its potential utilization in the future, and presents the effects of the use of solar energy on pollution. (GS)

Presents a simple means for extending the Bohr model to include relativistic corrections using a derivation similar to that for the non-relativistic case, except that the relativistic expressions for mass and kinetic energy are employed. (Author/GS)

In this note, we introduce a simple homemade toy called the brush-creeper, which can glide forward with no propellers, limbs, wheels, and seemingly no movement of any kind that can push forward against the ground. The toy arouses pupils' interest and their incentive to ask "Why?" in lessons related to friction.

A simple photometer constructed from an LED and an op amp can be used to measure light in a number of physical situations. A variety of LEDs exist to investigate different wavelength ranges. Combined with an inexpensive transit, the LED photometer can be used to carry out skylight studies and atmospheric optical depth measurements. The activities…

Describes a course that includes a basic core section comprised of a lecture series integrated with programmed practicals and a project section comprised of activities designed to give the students practice in electronic problem solving. (GS)

Outlines the major considerations for successful research participation by undergraduate students. Describes the value of this involvement to the students, factors leading to the success of the program, and student reaction to the program. (GS)

Describes an experiment that allows the students to verify the assumption that light travels in straight lines. (GS)

Physics 30 is a twelfth-grade physics course for students in Alberta, Canada. This document is a final test for the course. Intended for administration during January 1985, it contains 56 multiple-choice questions and four written-response problems. Two-and-one-half hours are allowed for completing the test. No answer key is included since scoring…

Physics 30 is a twelfth-grade physics course for students in Alberta, Canada. This document is a final test for the course. Intended for administration during June 1985, it contains 56 multiple-choice questions and three written-response problems. Two-and-one-half hours are allowed for completing the test. No answer key is included since scoring…