Presents a systematization of the mathematical formulae in thermodynamics. From the set of thermodynamic variables, four equations are derived which contain the total mathematical jargon of thermodynamics. (LC)

A critic of science identifies the ground from which emanate toys, games, and inventive play. The knowledge and other prerequisites characterizing the inventor of pastimes are examined, touching on the correspondence existing between the biological/physical sciences and games/inventions. (Author/JN)

Lists official SI units, temporarily accepted non-SI units, accepted non-SI units, and multipliers for SI units. (MLH)

Discusses new roles for physics research in cooperating with other sciences and applying physical principles for the general benefit of mankind. (MLH)

Discusses various definitions of physics, citing those characteristics that distinguish physics from other studies. (MLH)

Describes a simple ultrasonic experiment that can be used to measure the purity of liquid samples by detecting variations in the velocity of sound. Uses a phase shift detection technique that incorporates the use of logic gates and a piezoelectric transducer. (JRH)

Discusses the difficulty of drawing free-body diagrams which only show forces exerted on a body from its neighbors. Presents three ways a body may be modeled: a particle, rigid extended, and nonrigid extended. (MKR)

Presents an exercise to measure the modulus of elasticity of spider silk using a microforce transducer that can be built from materials readily available in the laboratory. (JRH)

Compares two theories of assessing functional knowledge for intuitive physics using choice and functional measurement responses (N=40) in two situations. Reports that the choice theory showed substantial frequencies of stepwise rules while functional measurement showed that most subjects integrated the two variables. Concludes that functional…

Draws the attention of teachers of basic university physics courses to student problems concerning the interpretation of the symbolic language used in physics. Reports specific difficulties found in the first physics course related to different kinds of statements expressed in the mathematical language. (Contains 15 references.) (Author/YDS)

Describes an approach to teaching quantum theory without math with emphasis on some innovative approaches and topics such as nonlocality and Bell's theorem. Written in the form of suggestions to prospective instructors. (JRH)

Describes the construction of lithographic gratings and Young's double slits by a contact print method that does not require any special skill or equipment. (JRH)

Reports that environmental radioactivity levels vary with temperature and precipitation and these effects are due to radon. Discusses the measurement of this environmental radioactivity and the theory behind it. (JRH)

Describes the physics behind the shadows cast on a stream bed by subtle dimples on the surface of transparent water. (JRH)