CK-12 Physics Simulation

CK-12 Foundation provides a library of free online textbooks, videos, exercises, flashcards, and real-world applications for over 5000 concepts. Physics is more than calculating the momentum of billiard balls hitting each other or the friction acting on a speeding car’s tires. Physics includes the study of practically every form of matter and how it interacts with other matter and with energy in various forms. The image shows one of several large parabolic antennas that NASA physicists used for years to communicate with ships and devices completing solar system exploration missions.