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, ...

A pair of mathematicians have proposed a unified theory of dark matter and dark energy that alters Einstein's equations describing the fundamentals of gravity. They suggest the law of energy and ...

Albert Einstein once said, “Energy cannot be created or destroyed; it can only be changed from one form to another.” He was describing the law of conservation of energy, ...

Maxwell’s equations of electromagnetism and the Euler equation top a poll to find the greatest equations of all time. Robert P Crease discusses the results of his reader survey First among equals – ...

Lowry Kirkby reviews The Theoretical Minimum: What You Need to Know to Start Doing Physics by Leonard Susskind and George Hrabovsky Thirst for physics: Leonard Susskind's popular series of lectures ...

When you hear the word "Work" what is the first thing you think of? When you hear the word, "Work," what is the first thing you think of? Maybe sitting at a desk? Maybe plowing a field? Maybe working ...

E = mc 2 may be the most quotidian equation in physics. Everyone’s heard of it and it’s been proven time and again. Did you convert mass into energy? Go tell it to the stars, whose light is generated ...