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  2. International Phonetic Alphabet - Wikipedia

    en.wikipedia.org/wiki/International_Phonetic...

    It was devised by the International Phonetic Association in the late 19th century as a standardized representation of speech sounds in written form. [1] The IPA is used by lexicographers, foreign language students and teachers, linguists, speech–language pathologists, singers, actors, constructed language creators, and translators.

  3. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.

  4. Twitter - Wikipedia

    en.wikipedia.org/wiki/Twitter

    X, commonly referred to by its former name Twitter, is a social media website based in the United States. With over 500 million users, it is one of the world's largest social networks and the fifth-most visited website in the world. [4] [5] Users can share text messages, images, and videos through posts (originally called "tweets"). [6]

  5. Albert Einstein - Wikipedia

    en.wikipedia.org/wiki/Albert_Einstein

    Albert Einstein ( / ˈaɪnstaɪn / EYEN-styne; [4] German: [ˈalbɛɐt ˈʔaɪnʃtaɪn] ⓘ; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist who is widely held to be one of the greatest and most influential scientists of all time. Best known for developing the theory of relativity, Einstein also made important ...

  6. Chalkboard scraping - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_scraping

    Chalkboard scraping. Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its ...

  7. Atlantic College - Wikipedia

    en.wikipedia.org/wiki/Atlantic_College

    UWC Atlantic. /  51.40139°N 3.53250°W  / 51.40139; -3.53250. UWC Atlantic (formally the United World College of the Atlantic, and often referred to by its original name, Atlantic College) is an independent boarding school in the Vale of Glamorgan in south Wales. Founded in 1962, it was the first of the United World Colleges and was ...

  8. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  9. 2011–12 Welsh Premier Women's League - Wikipedia

    en.wikipedia.org/wiki/2011–12_Welsh_Premier...

    The 2011–12 Welsh Premier League is the third season of the Women's Welsh Premier League, Wales ' premier football league. Northop Hall Girls replaced Llandudno Junction Ladies in the Northern Conference. [1] The season kicked off on Sunday, 25 September 2011, with the final being played on 13 May 2012. It was the last season to feature a ...