Documents A magnet is a material or object that produces magnetic field. This magnetic field is invisible and....

A magnet is a material or object that produces magnetic field. This magnetic field is invisible and causes the most notable property of a magnet: a force that pulls on nearby…

Technology A History of Atomic Clocks

1. Quantum MechanicsThe other great theory of modern physics Deals with very small objects  Electrons, atoms, moleculesGrew out of problems that seemed simple  Black-body…