PS2.B: Types of Interactions


Paul Andersen explains how objects interact when touching and at a distance.  Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces.  The strong and weak nuclear forces can result in radioactive decay.  A brief description of Newton's Law of Universal Gravitation and Coulomb's Law are includes.  A teaching progression from grades K-12 is also included.

CCC2: Cause and Effect


In this video Paul Andersen explains cause and effect its importance in science and engineering.  He starts by addressing the chain of interactions that must be present to show cause and effect.  He addresses the assumptions of universality and scale in determining cause and effect.  He finished the video with a progression of instruction from K-12.