A ball is sitting motionless on a dome. According to standard physics, it should stay put indefinitely, at least until the ...

A diagram of how a collapsing star ... in the 1970s as a potential solution to a physics puzzle unrelated to dark matter, the ...

Show the forces acting on an object in a free body diagram. The arrows represent the ... new to help your students get to grips with physics? In this short series of explainer films, Professor ...