In a 2006 book that garnered much press for its silly attacks on string theory, author and physicist Lee Smolin provides a list of “The Five Great Problems in Theoretical Physics.” There are many ...

The first semester of an undergraduate physics course invariably spends a lot of time on two big ideas: The momentum principle and the work energy principle. Both deal with forces acting on an object, ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Students learn to solve problems involving the law of conservation of momentum. Conservation of Momentum: Students learn to solve problems involving the law of conservation of momentum and to describe ...

Given the immutable laws of astrophysics, we are all only going in one direction — in circles at an extremely high velocity. Despite the appearance of sociopolitical regression, this is only a figment ...

In physics, the conundrum known as the 'few-body problem,' how three or more interacting particles behave, has bedeviled scientists for centuries. Equations that describe the physics of few-body ...