13-year-old inventor Aidan has discovered that trees use a mathematical formula to gather sunlight in crowded forests. Now he wonders why we don't collect solar energy the same way.
Demonstrates the differences between alternating current and direct current arc welding processes, and in particular the finer control available with AC machines at the time.
General Electric sponsors this explanation of atomic energy, detailing some of its uses besides the bomb. Using animation and an off-screen narrator, the film describes the atom, elements and isotopes, the discovery of transmutation, experiments in artificial transmutation, and the reasons for the...
