Describes the use of a digitized video image system in conducting radically different projectile experiments. Presents a detailed example of its use and discusses the advantages and disadvantages of using digitized video images. (JRH)

Discusses factors that determine whether or not a sunburn is possible under glass, including the spectral dependence of the skin's sensitivity to sunburn, the ground-level spectrum of solar radiation, and the wavelength dependence of the transmission for the particular piece of glass. Concludes that it is possible to get sunburned through glass.…

Describes the use of magnetic field probes interfaced to a microcomputer in measuring the magnetic field in and around a solenoidal "Slinky" spring toy carrying a current of a few amps. (JRH)

Discusses the continuity equation and presents two real-life problems involving salmon survival and the construction of dams. (JRH)

Presents a brief life history of William Sealy Gosset, the "Student" of Student's t-test. Reviews some basic statistics and describes Student's t-test of statistical hypothesis. Contains 11 references. (JRH)

Attempts to quantify the subjective sensation of brightness of the spot projected by a helium-neon laser and compares this with conventional sources of light. Provides an exercise in using the blackbody radiation formulas. (JRH)

Describes the planning and conducting of snow sled competitions as a means to teach concepts in classical mechanics. (JRH)

Describes the design, development, and validity of the Force Concept Inventory (FCI), a test designed to assess student understanding of the most basic concepts in Newtonian physics and to evaluate the effectiveness of instruction. Discusses various uses of the FCI and the interpretation of the FCI score. (JRH)

Describes the factor analysis and validity of the Force Concept Inventory (FCI), a test designed to assess student understanding of the most basic concepts in Newtonian physics and to evaluate the effectiveness of instruction. Discusses problems in the use of the FCI and urges caution in interpreting and using FCI scores. (JRH)

Briefly describes the first Astronomy Olympiad in Israel. Presents an example of deliberately planting errors in a scientific article in order to assess contestants' knowledge and their ability to confront familiar material presented in a nontraditional format. (JRH)

Describes an experiment that uses the ultrasonic transducer for demonstrating the Fourier components of waveshapes such as the square and triangular waves produced by laboratory function generators. (JRH)

Explores strategies in the situation of a runner trying to evade a tackler on a football field. Enables the student to test intuitive strategies in a familiar situation using simple graphical and numerical methods or direct experimentation. (JRH)

Describes a system of interactive astronomy whereby nonscience students are able to acquire their own images from a room remotely linked to a telescope. Briefly discusses some applications of Charge-Coupled Device cameras (CCDs) in teaching free fall, projectile motion, and the motion of the pendulum. (JRH)

Discusses the effects of gravity, local density compared to the density of the earth, the mine shaft, centrifugal force, and air buoyancy on the weight of an object at the top and at the bottom of a mine shaft. (JRH)

Explores reasons why students take introductory physics courses at the university regardless of their Advanced Placement (AP) exam performance. Briefly describes the nature of AP physics, the examination format and reporting of scores, and the results of a survey of physics departments regarding their policies towards AP exam scores and placement…