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  2. Comparison of Portuguese and Spanish - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_Portuguese...

    While the majority of lexical differences between Spanish and Portuguese come from the influence of the Arabic language on Spanish vocabulary, [1] [2] most of the similarities and cognate words in the two languages have their origin in Latin, [3] but several of these cognates differ, to a greater or lesser extent, in meaning.

  3. 2,4,5-Trichlorophenoxyacetic acid - Wikipedia

    en.wikipedia.org/wiki/2,4,5-Trichlorophenoxy...

    2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s, synthesized by reaction of 2,4,5-Trichlorophenol and chloroacetic acid. It was widely used in the agricultural industry until being phased out, starting ...

  4. English language - Wikipedia

    en.wikipedia.org/wiki/English_language

    As of 2016, 400 million people spoke English as their first language, and 1.1 billion spoke it as a secondary language. [70] English is the largest language by number of speakers . English is spoken by communities on every continent and on islands in all the major oceans.

  5. 1 + 2 + 3 + 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    where f (2k−1) is the (2k − 1)th derivative of f and B 2k is the (2k)th Bernoulli number: B 2 = ⁠ 1 / 6 ⁠, B 4 = ⁠− + 1 / 30 ⁠, and so on. Setting f ( x ) = x , the first derivative of f is 1, and every other term vanishes, so [ 15 ]

  6. Science - Wikipedia

    en.wikipedia.org/wiki/Science

    Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the behavioural sciences (e.g., economics, psychology, and sociology ...

  7. Population growth - Wikipedia

    en.wikipedia.org/wiki/Population_growth

    The CIA World Factbook gives the world annual birthrate, mortality rate, and growth rate as 1.86%, 0.78%, and 1.08% respectively. [28] The last 100 years have seen a massive fourfold increase in the population, due to medical advances , lower mortality rates, and an increase in agricultural productivity made possible by the Green Revolution .

  8. 1 − 2 + 3 − 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%E2%88%92_2_%2B_3_%E2%88...

    The first 15,000 partial sums of 0 + 12 + 3 − 4 + ... The graph is situated with positive integers to the right and negative integers to the left.

  9. macOS - Wikipedia

    en.wikipedia.org/wiki/MacOS

    Apple released 10.1 as a free upgrade CD for 10.0 users, in addition to the $129 boxed version for people running Mac OS 9. It was discovered that the upgrade CDs were full install CDs that could be used with Mac OS 9 systems by removing a specific file; Apple later re-released the CDs in an actual stripped-down format that did not facilitate ...