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  2. Atom (time) - Wikipedia

    en.wikipedia.org/wiki/Atom_(time)

    One of the earliest occurrences of the word "atom" to mean the smallest possible unit of measuring time is found in the Greek text of the New Testament in Paul's 1 Corinthians 15:52. The text compares the length of time of the “atom” to the time needed for "the twinkling of an eye."

  3. Schoolhouse Rock! - Wikipedia

    en.wikipedia.org/wiki/Schoolhouse_Rock!

    The first video of the series, "Three Is a Magic Number," originally debuted during the debut episode of Curiosity Shop on September 2, 1971. [5] The Curiosity Shop version is an extended cut which includes an additional scene/verse of 15 seconds in length that explains the pattern of each set of ten containing three multiples of three ...

  4. Period (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Period_(periodic_table)

    Hydrogen readily loses and gains an electron, and so behaves chemically as both a group 1 and a group 17 element. Hydrogen (H) is the most abundant of the chemical elements, constituting roughly 75% of the universe's elemental mass. [1] Ionized hydrogen is just a proton. Stars in the main sequence are mainly composed of hydrogen in its plasma ...

  5. List of Schoolhouse Rock! episodes - Wikipedia

    en.wikipedia.org/wiki/List_of_Schoolhouse_Rock...

    During school on a cold winter's day, a young girl's thoughts about the multiplication of 8 revolve around winter games, particularly ice skating. The video briefly explores the distributive property of multiplication/addition for multiplying 8 by numbers higher than 10, and closes by noting the numeral 8's resemblance to a sideways infinity ...

  6. William Houlder Zachariasen - Wikipedia

    en.wikipedia.org/wiki/William_Houlder_Zachariasen

    The four rules for the formation of a glass from an oxide are: An oxygen atom is linked to no more than two glass-forming atoms A. The number of oxygen atoms around each glass-forming atom A is small, perhaps 3 or 4. Among the oxygen-containing polyhedra, a polyhedron cation A shares corners, but no sides or faces.

  7. Hourglass - Wikipedia

    en.wikipedia.org/wiki/Hourglass

    Unlike most other methods of measuring time, the hourglass concretely represents the present as being between the past and the future, and this has made it an enduring symbol of time as a concept. The hourglass, sometimes with the addition of metaphorical wings, is often used as a symbol that human existence is fleeting, and that the " sands of ...

  8. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    The Scottish physicist James Clerk Maxwell proposed measuring time with the vibrations of light waves in his 1873 Treatise on Electricity and Magnetism: 'A more universal unit of time might be found by taking the periodic time of vibration of the particular kind of light whose wave length is the unit of length.' [5] [6] Maxwell argued this ...

  9. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/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).