Describes four body-lever models (biceps, triceps, back lever when lifting, foot lever and Achilles tendon muscle) used in noncalculus physics courses. Instructions for constructing the wooden models are provided. Also describes an improvement on a centripetal-force apparatus so that it is easier to operate. (JN)

Describes a multidisciplinary project/experiment in which undergraduate students repaired a nonfunctional Helium-Neon laser. Includes experimental procedures used and results. (JN)

Discusses the role and use of microcomputers in scientific research, from monitoring instruments to controlling experimental processes. Included are descriptions of a computer-controlled protein sequencer and gene synthesizer, and microcomputer uses in medicine, physiology, biochemistry, and geology. (JN)

Describes an experiment on a coupled system in which accurate timing is carried out using a Light Activated Switch (LAS) technique. LAS can be used for a wide range of periodic phenomena, provided the amplitude is sufficiently large to interrupt a light beam. (Author/SK)

Discusses how physics was done at the University of California at Berkeley in the 1930s, focusing on the faculty and their accomplishments, physics experiments, physics instruments/equipment (cyclotron and rhumbatron), and research problems and their solutions. Includes reminiscences about lectures on thermodynamics presented by Otto Stern during…

Discusses several science experiments/activities and their associated measurements. These include a simple projectile activity, cartesian diver (used to measure altitude and atmospheric pressure), experiment demonstrating atmospheric pressure, and activities using a stroboscope, and electrometer. (JN)

The threat of instrument obsolescence and tight federal budgets have conspired to threaten the existence of research analytical laboratories. Despite these and other handicaps most existing laboratories expect to keep operating in support of basic research, though there may be serious penalties in the future unless funds are forthcoming. (Author)

Provides an overview of a one-semester course in rocks and minerals for non-geology majors taught at Pittsburg State University. Includes information involving the methodology and content of the course, equipment needed, textbook selection, and general impressions of the course. (DS)

A 1.5-MeV High Voltage Electron Microscope has been installed at the Lawrence Berkeley Laboratory which will help materials scientists and biologists study samples in more true-to-life situations. A 1-MeV Atomic Resolution Microscope will be installed at the same location in two years which will allow scientists to distinguish atoms. (DS)

A description is given of an inexpensive nuclear magnetic resonance (NMR) spectrometer suitable for use in advanced laboratory courses. Applications to the nondestructive analysis of the oil content in corn seeds and in monitoring the crystallization of polymers are presented. (SK)

The authors discuss microcomputers and their usefulness in the undergraduate program. The results from a questionnaire indicate their high degree of success with students. (SA)

Pinpoints common areas of neglect in considering science safety. Familiar hazards are discussed, with special consideration of improper chemical storage, old and unlabeled chemicals, and faulty circuits and equipment. An appendix lists basic safety rules and presents a checklist for general laboratory safety. (CS)

Describes construction of a model that can demonstrate the activities of the human lungs. Among these are the effects of occluding the trachea and respiratory opening, the action of diaphragmatic and negative-pressure breathing and pressure changes. (SA)

Describes the design of a simple yet flexible microprocessor and how to construct it using a breadboard. (DC)

Examines the nature of laser light. Topics include: (1) production and characteristics of laser light; (2) nine types of lasers; (3) five laser techniques including holography; (4) laser spectroscopy; and (5) laser fusion and other applications. (SK)