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  2. Hydraulic jumps in rectangular channels - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_Jumps_in...

    Hydraulic jump in a rectangular channel, also known as classical jump, is a natural phenomenon that occurs whenever flow changes from supercritical to subcritical flow. In this transition, the water surface rises abruptly, surface rollers are formed, intense mixing occurs, air is entrained, and often a large amount of energy is dissipated.

  3. List of countries in the Americas by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_in_the...

    All calculations are based on raw data; so due to the nuances of rounding, in some places illusory inconsistencies of indicators arose, with a size of 0.01 year. In 2014, some of the world's leading countries had a local peak in life expectancy, so this year is chosen for comparison with 2019 and 2022.

  4. Abacus - Wikipedia

    en.wikipedia.org/wiki/Abacus

    Bi-quinary coded decimal-like abacus representing 1,352,964,708. An abacus (pl.: abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1]

  5. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    The diameter of the equivalent large format round shape is rounded to the nearest 1 ⁄ 8 inch to provide the bar size. For example, #9 bar has a cross section of 1.00 square inch (6.5 cm 2 ), and therefore a diameter of 1.128 inches (28.7 mm). #10, #11, #14, and #18 sizes correspond to 1 1 ⁄ 8 inch, 1 1 ⁄ 4 , 1 1 ⁄ 2 , and 2-inch square ...

  6. Round Top, Texas - Wikipedia

    en.wikipedia.org/wiki/Round_Top,_Texas

    Round Top is a town in Fayette County, Texas, United States. The population was 87 at the 2020 census. History. As a part of the Stephen F. Austin colony, James ...

  7. List of countries by past and projected future population

    en.wikipedia.org/wiki/List_of_countries_by_past...

    The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.

  8. 2004 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2004_United_States...

    Presidential election results map. Red denotes states won by Bush/Cheney and blue denotes those won by Kerry/Edwards. Light blue is the electoral vote for John Edwards by a Minnesota faithless elector.

  9. Motor vehicle fatality rate in U.S. by year - Wikipedia

    en.wikipedia.org/wiki/Motor_vehicle_fatality...

    Year Deaths VMT– Vehicle miles traveled (billions) Fatalities per 100 million VMT Population Fatalities per 100,000 population Change in per capita fatalities from previous year