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  2. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic.Each prefix has a unique symbol that is prepended to any unit symbol.

  3. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement.

  4. Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Main_Page

    Volcanism of the Mount Edziza volcanic complex in British Columbia, Canada, spans more than 7 million years.The first magmatic cycle took place between 7.5 and 6 million years ago and is represented by the Raspberry, Little Iskut and Armadillo geological formations.

  5. Display resolution standards - Wikipedia

    en.wikipedia.org/wiki/Display_resolution_standards

    Such a resolution can vertically scale SD content to fit by natural numbers (6 for NTSC and 5 for PAL). Horizontal scaling of SD is always fractional (non-anamorphic: 5.33...5.47, anamorphic: 7.11...7.29). The first display with this resolution was the Dell UltraSharp UP2715K, announced on September 5, 2014. [66]

  6. Physics - Wikipedia

    en.wikipedia.org/wiki/Physics

    Physics is the scientific study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. [1] ...

  7. Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Hydrometer

    Schematic drawing of a hydrometer. The lower the density of the fluid, the deeper the weighted float B sinks. The depth is read off the scale A.. A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy.

  8. Richter scale - Wikipedia

    en.wikipedia.org/wiki/Richter_scale

    The Richter scale [1] (/ ˈ r ɪ k t ər /), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [2] is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude scale". [3]

  9. List of musical instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_instruments

    Instrument Picture Classification H-S Number Elementary organology class Origin Common classification Relation Celesta-struck idiophone-metallophone-set of percussion plaques