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  2. One half - Wikipedia

    en.wikipedia.org/wiki/One_half

    One half is the rational number that lies midway between 0 and 1 on the number line. Multiplication by one half is equivalent to division by two, or "halving"; conversely, division by one half is equivalent to multiplication by two, or "doubling".

  3. Finite element method - Wikipedia

    en.wikipedia.org/wiki/Finite_element_method

    When applying FEA, the complex problem is usually a physical system with the underlying physics, such as the Euler–Bernoulli beam equation, the heat equation, or the Navier –Stokes equations, expressed in either PDEs or integral equations, while the divided, smaller elements of the complex problem represent different areas in the physical ...

  4. List of radioactive nuclides by half-life - Wikipedia

    en.wikipedia.org/wiki/List_of_radioactive...

    1.55 5.6 mendelevium-259: 1.60 5.8 americium-238: 1.63 5.9 astatine-208: 1.63 5.9 polonium-205: 1.66 6.0 einsteinium-249: 1.703 6.13 bismuth-202: 1.72 6.2 astatine-207: 1.80 6.5 bismuth-201: 1.80 6.5 protactinium-239: 1.8 6.5 fluorine-18: 1.8295 6.586 americium-245: 2.05 7.4 einsteinium-250m: 2.22 8.0 radon-210: 2.4 8.6 lead-198: 2.4 8.6 curium ...

  5. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]

  6. Mississippi-class battleship - Wikipedia

    en.wikipedia.org/wiki/Mississippi-class_battleship

    Recent US warships had mounted a combination of a few 7-inch or 6-inch guns and many smaller guns in the 2-inch (51 mm) to 3-inch (76 mm) range (6-pounder to 12-pounder in the traditional terms). The larger of these guns were typically protected in casemates [25] and the smaller ones open on the deck or in lightly protected casemates. [26]

  7. 2012 phenomenon - Wikipedia

    en.wikipedia.org/wiki/2012_phenomenon

    [35] [c] Thus this inscription anticipates the current universe lasting at least 20 21 ×13×360 days, [26] or roughly 2.687×10 28 years; a time span equal to 2 quintillion times the age of the universe as determined by cosmologists. Others have suggested that this date marks creation as having occurred after that time span.

  8. World population - Wikipedia

    en.wikipedia.org/wiki/World_population

    The UN Department of Economics and Social Affairs projects between 9 and 10 billion people by 2050 and gives an 80% confidence interval of 10–12 billion by the end of the 21st century, [1] with a growth rate by then of zero. Other demographers predict that the human population will begin to decline in the second half of the 21st century. [6]

  9. Obesity - Wikipedia

    en.wikipedia.org/wiki/Obesity

    In 2014, more than 600 million adults were obese, equal to about 13 percent of the world's adult population, [218] with that figure growing to 16% by 2022, according to the World Health Organisation [219] The percentage of adults affected in the United States as of 2015–2016 is about 39.6% overall (37.9% of males and 41.1% of females). [220]