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  2. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    At 25 °C (77 °F), solutions of which the pH is less than 7 are acidic, and solutions of which the pH is greater than 7 are basic. Solutions with a pH of 7 at 25 °C are neutral (i.e. have the same concentration of H + ions as OH − ions, i.e. the same as pure water). The neutral value of the pH depends on the temperature and is lower than 7 ...

  3. Finite element method - Wikipedia

    en.wikipedia.org/wiki/Finite_element_method

    A finite element method is characterized by a variational formulation, a discretization strategy, one or more solution algorithms, and post-processing procedures. Examples of the variational formulation are the Galerkin method, the discontinuous Galerkin method, mixed methods, etc.

  4. 100 prisoners problem - Wikipedia

    en.wikipedia.org/wiki/100_prisoners_problem

    The proof is based on an equivalence to a related problem in which all prisoners are allowed to be present in the room and observe the opening of the drawers. Mathematically, this equivalence is based on Foata's transition lemma, a one-to-one correspondence of the (canonical) cycle notation and the one-line notation of permutations. In the ...

  5. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    Water is an inorganic compound with the chemical formula H 2 O.It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance.It is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [20]).

  6. Fracking - Wikipedia

    en.wikipedia.org/wiki/Fracking

    Hydraulic fracturing [a] is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid. The process involves the high-pressure injection of "fracking fluid" (primarily water, containing sand or other proppants suspended with the aid of thickening agents) into a wellbore to create cracks in the deep rock formations through which natural gas, petroleum ...

  7. Demographics of Uzbekistan - Wikipedia

    en.wikipedia.org/wiki/Demographics_of_Uzbekistan

    Birlik held campaigns in the late 1980s to achieve this goal, with one event in 1989 culminating in 12,000 people in Tashkent calling for official recognition of Uzbek as the state language. [50] In 1995, the government adopted the Law of the Republic of Uzbekistan on State Language, which mandates that Uzbek be used in all public spheres and ...

  8. Reason - Wikipedia

    en.wikipedia.org/wiki/Reason

    Reason is the capacity of consciously applying logic by drawing valid conclusions from new or existing information, with the aim of seeking the truth. [1] It is associated with such characteristically human activities as philosophy, religion, science, language, mathematics, and art, and is normally considered to be a distinguishing ability possessed by humans.

  9. Divorce in the United States - Wikipedia

    en.wikipedia.org/wiki/Divorce_in_the_United_States

    This creates the question of which state can one get divorced in. All states have rules for jurisdiction, which is typically a time frame the person filing the divorce has lived in the state. [ 33 ] Most states require the person filing for a divorce to be a physical resident of the state for six months.