Presents experiments, models, and interpretations of reports that hot water begins to freeze faster than cooler water. Preliminary conclusions show that the surface area, side wall cooling, evaporation, and environment are the most important parameters. (DS)

Reports a verification that hot water begins to freeze sooner than cooler water. Includes the investigations that lead to the conclusions that convection is a major influence, water content may have some effect, and the melting of the ice under the container makes no difference on the experimental results. (DS)

Emphasizes firewalking as a good illustration of basic concepts in thermodynamics. Describes the basic principles of firewalking and other factors including the cooling of the surface embers, moisture of the feet, thick skin on the feet, tolerance for pain, and other uncontrolled factors. (YP)

Describes some activities for students in which the quantity of heat is measured in exercises that use inexpensive materials. (BR)

Describes a series of educational and entertaining demonstrations using liquid nitrogen. (CP)

Presents activities that integrate physics, earth science, and health. Students explore their own sensible temperature focusing on the physical processes of heat transfer. (DDR)

Suggests an apparatus to improve the measurement of the mechanical equivalent of heat. Describes the materials needed to construct the apparatus; the methodology of an experiment to measure the heat gained by lead shot falling through a distance of 100 meters; and the calculations made to register that gain. (MDH)

Describes an apparatus capable of measuring absolute temperatures of a tungsten filament bulb up to normal running temperature and measuring Botzmann's constant to an accuracy of a few percent. Shows that electrical noise techniques are convenient to demonstrate how the concept of temperature is related to the micro- and macroscopic world. (CW)