Describes science activities which have been successful with nonscience majors. Each activity requires students to make observations, record the data gathered, interpret data, and prepare a written report. Subject areas include motion of stars, sunspots, lunar orbits, sunset points, meteor showers, and sun shadows. (JN)

Although the concept of heat permeates the subject of chemistry, conceptual and semantic inconsistencies related to this concept are found in classroom situations and in the literature. These conceptual and semantic inconsistencies are examined, exploring other problematic areas associated with the concept (such as notation and entropy flow). (JN)

Reviews techniques for online coupling of high-performance liquid chromatography with mass spectrometry, emphasizing those suitable for application to nonvolatile samples. Also summarizes the present status, strengths, and weaknesses of various techniques and discusses potential applications of recently developed techniques for combined liquid…

To contribute usefully to a lecture, slides containing tabulated or diagrammatic textual information need to be simple and legible. Such slides can be made by following a few straightforward rules and techniques. Several of these rules and techniques are provided. (JN)

Provides a method for correcting the photoemission from a collector when using the photoelectric effect experiment to determine Planck's constant. The problem results from a negative current through the cell and makes the measurement of the cutoff potential difficult. (DH)

Presents a field formula for calculating speed and flight efficiency of soaring birds. By estimating the size of the bank angle and timing the complete circle, the observer can determine the speed and circling radius on a chart provided. Lift coefficients and flight characteristics of several birds are also discussed. (DH)

Discusses the availability of proteins, carbohydrates, lipids, vitamins, and minerals in processed food. (JN)

Discusses factors which control rate and orientation of free radical addition to alkenes. Although based primarily on results involving behavior of alkyl radicals, arguments developed apply to addition of atoms and hetero-radicals to olefins. (JN)

Discusses the microscopic interpretation of thermal conductivity of various forms of matter. Forms considered include gases, metals, and insulators. (JN)

Provides procedures for a simple laboratory activity on exponential growth and its characteristic doubling time. The equipment needed consists of a large plastic bucket, an eyedropper, a stopwatch, an assortment of containers and graduated cylinders, and a supply of water. (JN)

Background information, materials needed, laboratory procedures, and typical results are provided for five high performance liquid chromatography experiments (three isocratic and two step gradient separations). Suggestions for further experimentation are also provided, including quantitative determinations and separation of charged solutes. (JN)

Describes the construction of a simple, commercial-type electrode which is compact, not orientation sensitive, and requires the minimum of expensive materials (platinum and mercury). (JN)

Discusses errors/misleading statements concerning the principle of action/reaction as found in two published sources. The first, focusing on the application of Newton's third law to airplane lift, is found in a college-level text. The second, related to electromagnetic forces, is found in a book providing solutions to physics problems. (JN)

An interactive videotex/telewriting system called CYCLOPS has been used since 1981 to tutor Open University students at a distance. Its use in relation to teaching biology and other science subjects is discussed. Evaluation results suggest there is a great potential for such videotex in science education. (Author)

Supports the contention that sliding friction explains the inversion of a tippe top when it is spun upon a flat surface. Provides a rigorous analysis of the top's mechanics, together with computer-generated solutions of its equations of motion. (MLH)