An informative presentation covers motion, metric system, conversions, graphing of coordinates and lines, speed, velocity, and acceleration problems, as well as mean calculations. This is the first lesson in a 26-part series.

Resistance is not futile, it is voltage divided by current. The presentation goes in depth covering electric charges, conductors, insulators, electric fields, static charges, and circuits. The lesson is the 12th in a series of 26.

Buoyancy is the fine line between a ship and a submarine. The presentation covers fluid pressure, air pressure, Pascal's Principle, elevation, Archimedes Principle, buoyancy, and Bernoulli's Principle.

The biggest magnet in the world is at the Los Alamos National Laboratory in New Mexico and can reach 100 tesla. By comparison, magnets that lift cars are about two tesla. The 11th presentation in this series covers magnetism,...