Outlines the use of the toy popularly known as Newton's Cradle or Newton's Balls in illustrating the laws of conservation of momentum and mechanical energy. Discusses in detail the joint effects of elasticity, friction, and ball alignment on the rate of damping of this apparatus. (JRH)

Presents an experiment that demonstrates conservation of momentum and energy using a box on the ground moving backwards as it is struck by a projectile. Discusses lab calculations, setup, management, errors, and improvements. (JRH)

Presents exercises that analyze the additive property of energy. Concludes that if a body has more than one component of energy depending on the same physical quantity, the body's total energy will be the algebraic sum of the components if a linear relationship exists between the energy components and that physical quantity. (JRH)

Discusses a series of experiments to establish a significance of temperature difference in rates of cooling, to illustrate the connection between energy transfer and the consequent temperature changes for thermally connected systems that are not in equilibrium. (MKR)

Presents the Astro-Blaster as a method of the laws of conservation of momentum and energy during the creation of a supernova. Several elastic balls are aligned for a drop, followed by multiple collisions which result in the top ball reaching tremendous heights relative to the drop height. (JRH)

Describes some inexpensive activities and demonstrations that illustrate basic concepts that are often overlooked, as a low-cost means to foster student participation in physics classes. Activities described deal with acceleration and forces, freefall, conservation of energy and momentum, conservation of angular momentum, and resonance. (JRH)

Presented in English and French, Biology 20-30 is an academic program that helps students in Alberta, Canada, better understand and apply fundamental concepts and skills. The major goals of the program are: (1) to develop in students an understanding of the interconnecting ideas and principles that transcend and unify the natural science…

Critiques the "energy circus," an approach to the introduction of ideas of energy transformation and conservation which is in common use in secondary schools. Identifies some practical and conceptual difficulties and outlines an alternative approach used in introducing ideas about energy using real devices and arrow notation. (CW)

Describes three case studies of the use of the Learning in Science Project (Energy) in New Zealand. Themes discussed include systems undergoing change, defining initial and final conditions, energy as a nonmaterial factor of change, forms of energy and conservation of energy. Mentions other issues and research. (CW)