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  2. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A simple fraction (also known as a common fraction or vulgar fraction, where vulgar is Latin for "common") is a rational number written as a/b or ⁠ ⁠, where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include ⁠ 1 / 2 ⁠, − ⁠ 8 / 5 ⁠, ⁠ −8 / 5 ⁠, and ⁠ 8 / −5 ⁠

  3. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    Ozone (/ ˈ oʊ z oʊ n /) (or trioxygen) is an inorganic molecule with the chemical formula O 3.It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope O

  4. Photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis

    Some organisms employ even more radical variants of photosynthesis. Some archaea use a simpler method that employs a pigment similar to those used for vision in animals. The bacteriorhodopsin changes its configuration in response to sunlight, acting as a proton pump. This produces a proton gradient more directly, which is then converted to ...

  5. Alcohol (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Alcohol_(chemistry)

    The simplest primary alcohol is methanol (CH 3 OH), for which R = H, and the next is ethanol, for which R = CH 3, the methyl group. Secondary alcohols are those of the form RR'CHOH, the simplest of which is 2-propanol (R = R' = CH 3). For the tertiary alcohols, the general form is RR'R"COH.

  6. Problems with Einstein's general theory of relativity - Wikipedia

    en.wikipedia.org/wiki/Problems_with_Einstein's...

    The simplest interpretation of these disagreements is that perhaps Einstein's gravitational theory, whose principles and rules were tailored for a static universe with time-symmetry, reversible equations, and conventional energy-conservation, may simply not work in an expanding universe where none of these laws are valid.

  7. Value-added tax - Wikipedia

    en.wikipedia.org/wiki/Value-added_tax

    The Neumark Report published in 1962 concluded that France's VAT model would be the simplest and most effective indirect tax system. This led to the EEC issuing two VAT directives, adopted in April 1967, providing a blueprint for introducing VAT across the EEC, following which, other member states (initially Belgium, Italy, Luxembourg, the ...

  8. British Raj - Wikipedia

    en.wikipedia.org/wiki/British_Raj

    The British Raj (/ r ɑː dʒ / RAHJ; from Hindustani rāj, 'reign', 'rule' or 'government') [10] was the rule of the British Crown on the Indian subcontinent, [11] lasting from 1858 to 1947. [12]