Welcome to Physics for Free. Flash simulation, Animation, Illustration, Picture, Diagram. Physics Lessons, Tutorials and Physics Help. Active Physics. Physics Teaching Technology Resource. The Scale of the Universe. 10 Strange Things About The Universe.
Space The universe can be a very strange place.
While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ?
273.15°C, where the motion of all particles stops completely. Physics Lessons, Tutorials and Physics Help. The Physics Classroom. Physics Games - online physics-based games.