Learn how to solve and verify Kepler’s Third Law for circular orbits. This video walks through the physics and mathematics connecting orbital period, radius, and gravitational force, showing how ...

The first part of the course includes six units, Physical World and Measurement, Kinematics, Laws of Motion, Work, Energy and ...

So much in Happy Patel reminded me of Zach Braff’s sitcom: the cutaways and inserts, the sheer number of throwaway gags, the ...

Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

An illustration of a magnifying glass. An illustration of a magnifying glass.