Discusses the exponential growth of energy consumption and future consequences. Possible methods of converting solar energy to power such as direct energy conversion, focusing collectors, selective rediation absorbers, ocean thermal gradient, and space solar power are considered. (DF)

A survey of the life of a physics teacher who has been successful in making changes in curriculum. Describes work on an Australian adaptation of Project Physics. (DF)

A simplified discussion of how a whip cracks and what happens when an ideal chain runs over an ideal pulley or off the edge of an ideal table. (MM)

Presents the historical and physical bases of van der Waals theory on the states of matter. Article is intended for students with high school physics background. (DF)

Discusses the various views on Galileo's demonstration of free fall. Cites several historians' accounts of early free fall experiments and Galileo's contributions to knowledge in this area. (TS)

Short articles describe the use of a lever to transfer energy between pucks on a frictionless surface, a demonstration of the principle of conservation of linear momentum, the construction of an inexpensive joulemeter, the design and construction of a simple logic demonstration board using integrated circuits, mounting of Geiger-counters to…

Provides tips on opportunities for entering the scientific journalism field. (PR)