PHYSICS TERMS

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

Echo, a repeated sound. The term is usually used to refer to sound that is reflected from a surface and returned to its source after a noticeable delay.

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  • How are frequency and wavelength of light related?

    How are frequency and wavelength of light related?

    Frequency has to do with wave speed and wavelength is a measurement of a wave's span. Learn how frequency and wavelength of light are related in this article. See more »

  • Mass (physics)

    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. See more »

  • Physics

    Physics

    Physics, the science that deals with matter and energy and the relationships that exist between them. See more »

  • Pyrometer

    Pyrometer

    Pyrometer, an instrument for measuring temperature. Although the term pyrometer is generally considered to apply to instruments that measure high temperatures only, some pyrometers are designed to measure low temperatures. See more »

  • Calorie

    Calorie

    Calorie, a unit for measuring the amount of heat released or absorbed by a substance. See more »

  • Calorimeter

    Calorimeter

    Calorimeter, an instrument for measuring the amount of heat released or absorbed in physical and chemical processes. See more »

  • Capillary Action

    Capillary Action

    Capillary Action, or Capillarity, the tendency of liquids to rise or to be depressed in tubes of small diameter. See more »

  • Carat

    Carat

    Carat, a unit of weight for precious stones. The international, or metric, carat was standardized in 1913 and accepted by the United States and many other countries. See more »

  • Centrifuge

    Centrifuge

    Centrifuge, a machine that separates liquids of different densities. It can also separate liquids from solids that are held in suspension. See more »

  • Charles' Law

    Charles' Law

    Charles' Law, in physics, a principle that deals with the effect of heat on the expansion of gases. See more »

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