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  2. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    So, for example, if a route is 20 kilometres (12 mi) with 1600 metres of climb (as is the case on leg 1 of the Bob Graham Round, Keswick to Threlkeld), the equivalent flat distance of this route is 20+(1.6×8)=32.8 kilometres (20.4 mi). Assuming an individual can maintain a speed on the flat of 5 km/h, the route will take 6 hours and 34 minutes.

  3. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    Each standard deviation represents a fixed percentile. Thus, rounding to two decimal places, −3σ is the 0.13th percentile, −2σ the 2.28th percentile, −1σ the 15.87th percentile, 0σ the 50th percentile (both the mean and median of the distribution), +1σ the 84.13th percentile, +2σ the 97.72nd percentile, and +3σ the 99

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

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

    Twenty-three yoctoseconds is the time needed to traverse a 7-femtometre distance at the speed of light—around the ... 1.12 bohrium-271: 1.2 thorium-215: 1.2 radium-208:

  5. Steel - Wikipedia

    en.wikipedia.org/wiki/Steel

    As more steel is produced than is scrapped, the amount of recycled raw materials is about 40% of the total of steel produced – in 2016, 1,628,000,000 tonnes (1.602 × 10 9 long tons; 1.795 × 10 9 short tons) of crude steel was produced globally, with 630,000,000 tonnes (620,000,000 long tons; 690,000,000 short tons) recycled.

  6. Human - Wikipedia

    en.wikipedia.org/wiki/Human

    The typical height of an adult human is between 1.4 and 1.9 m (4 ft 7 in and 6 ft 3 in), although this varies significantly depending on sex, ethnic origin, and family bloodlines. [ 239 ] [ 240 ] Body size is partly determined by genes and is also significantly influenced by environmental factors such as diet , exercise, and sleep patterns .

  7. Austin, Texas - Wikipedia

    en.wikipedia.org/wiki/Austin,_Texas

    The overnight low drops to or below freezing 12 times per year, [78] and sinks below 45 °F (7 °C) during 76 evenings per year, mostly between mid-December and mid-February. The average first and last dates for a freeze are December 1 and February 15, giving Austin an average growing season of 288 days, and the coldest temperature of the year ...

  8. 2008 financial crisis - Wikipedia

    en.wikipedia.org/wiki/2007–2008_financial_crisis

    During the 1980s and 1990s, the national median home price ranged from 2.9 to 3.1 times median household income. By contrast, this ratio increased to 4.0 in 2004, and 4.6 in 2006. [ 293 ] This housing bubble resulted in many homeowners refinancing their homes at lower interest rates, or financing consumer spending by taking out second mortgages ...

  9. 2009 swine flu pandemic - Wikipedia

    en.wikipedia.org/wiki/2009_swine_flu_pandemic

    Some studies estimated that the real number of cases including asymptomatic and mild cases could be 700 million to 1.4 billion people—or 11 to 21 percent of the global population of 6.8 billion at the time. [9] The lower value of 700 million is more than the 500 million people estimated to have been infected by the Spanish flu pandemic. [23]