Major physics terms are explained in these articles. Here you can learn about some of the fundamental physics concepts.

Mass (physics)

Mass, in physics, the property of matter that causes it to have inertia. (Inertia is the resistance of an object to any change in its motion.) The more mass an object has, the more inertia it has.

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  • Torsion


    Torsion, the stress produced in a body when it is twisted. The twist in the body is produced by torque. See more »

  • Ultraviolet Radiation

    Ultraviolet Radiation

    Ultraviolet Radiation, electromagnetic radiation with wavelengths between those of visible violet light and those of X rays. See more »

  • Vacuum


    Vacuum, a space in which there is no matter. In a strict sense, there is no such thing as a vacuum—even the virtually empty regions of the universe between the galaxies contain some matter. See more »

  • Work


    Work, in physics, the movement of a body by a force acting against a resistance. Work is performed when a person lifts a weight, since the person applies a force to move the weight upward. See more »

  • Xray


    X Rays, electromagnetic radiation similar to that of visible light, but of much shorter wavelength. See more »

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