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  2. Ultraviolet index - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_index

    The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn -producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public. The UV index is designed as an open-ended linear scale, directly proportional to the ...

  3. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z ). [1]

  4. List of current United States senators - Wikipedia

    en.wikipedia.org/wiki/List_of_current_United...

    January 20, 2021: 2028 Class 3 Atlanta: Hawaii: Brian Schatz: Democratic October 20, 1972 (age 51) Teacher Nonprofit organization executive Lieutenant Governor of Hawaii Hawaii House of Representatives: Pomona College : December 26, 2012: 2028 Class 3 Honolulu: Mazie Hirono: Democratic November 3, 1947 (age 76) Lawyer U.S. House

  5. Banana equivalent dose - Wikipedia

    en.wikipedia.org/wiki/Banana_equivalent_dose

    A banana contains naturally occurring radioactive material in the form of potassium-40. Banana equivalent dose ( BED) is an informal unit of measurement of ionizing radiation exposure, intended as a general educational example to compare a dose of radioactivity to the dose one is exposed to by eating one average-sized banana.

  6. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details ...

  7. Sunlight - Wikipedia

    en.wikipedia.org/wiki/Sunlight

    Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon.

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