Deviation of basic equations needed to determine the height attained by an astronaut. Using known physical properties and measurement made from observing television coverage, the heights can be determined. (DF)

Bernoulli's Theorem yields information on what goes on inside a fluid while Newton's Third Law explains the external encounter, such as a lift-producing encounter between air and a wing. (DF)

Provides a review of the great discoveries, theoretical concepts and development of physics in the 20th century. The growth and significance of diverse fields such as quantum theory, relativity theory, atomic physics, molecular physics, the physics of the solid state, nuclear physics, astrophysics, plasma physics, and particle physics are…

An oilwell drilling rig accidentally drilled into an underground salt mine, draining a lake and filling the mine, with water jetting out of the mine 400 feet into the air. An explanation of the jetting phenomenon is offered in terms of the laws of fluid dynamics, with supporting diagrams and calculations. (Author/JN)

Cosmology is the theory by which the structure and history of the universe is described. Discusses the relationship between cosmology, gravity, and quantum mechanics, and whether the relationship can be formulated through Einstein's theory or a modification of it. Also discusses progress made in these scientific areas. (JN)

Discusses cognitive mechanisms facilitating effective problem solving in physics (mechanics). Considers content, organization, and description of the knowledge base facilitating scientific problem solving. Also considers procedures used to describe and analyze a problem initially, to search for its solution, and to assess the solution. Educational…

Although most waves studied by students satisfy the linear equation, particle physicists have become interested in nonlinear waves--those not satisfying the superposition principle. A mechanical wave system, satisfying the sine-Gordon equation, can be constructed using a modified transverse wave system to demonstrate nonlinear wave-particle…