The speed of light is constant, or so textbooks say. But some scientists are exploring the possibility that this cosmic speed limit changes, a consequence of the nature of the vacuum of space. The ...

Isokinetic exercise is a type of strength training in which the speed of the movement remains constant, but the resistance varies. People tend to use specialized exercise machines to perform these ...

I see this problem all the time. The idea that if you apply a constant force on an object, it should move at a constant speed. Really, this is what Aristotle would say, right? There are two course ...