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, ...

Consider two model cars of mass 1.2 and 1.4 kg colliding at the speeds shown: If the two cars stick together after the collision and move as one then the velocity \({v _{AB}}\) of the two cars can be ...

Angular momentum is a fundamental quantity in physics that describes the rotational motion of objects. In quantum physics, it encompasses both the intrinsic spin of particles and their orbital motion ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

A new quantum measurement technique reshapes uncertainty, allowing precision once thought impossible under Heisenberg’s principle.