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  2. NACA airfoil - Wikipedia

    en.wikipedia.org/wiki/NACA_airfoil

    For example, the NACA 23112 profile describes an airfoil with design lift coefficient of 0.3 (0.15 × 2), the point of maximum camber located at 15% chord (5 × 3), reflex camber (1), and maximum thickness of 12% of chord length (12). The camber line for the simple case (S = 0) is defined in two sections: [11]

  3. Logistic function - Wikipedia

    en.wikipedia.org/wiki/Logistic_function

    The standard logistic function is the logistic function with parameters =, =, =, which yields = + = + = / / + /.In practice, due to the nature of the exponential function, it is often sufficient to compute the standard logistic function for over a small range of real numbers, such as a range contained in [−6, +6], as it quickly converges very close to its saturation values of 0 and 1.

  4. List of countries by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_life...

    This is especially true for Healthy life expectancy, the definition of which criteria may change over time, even within a country. For example, Canada is a country with a fairly high overall life expectancy at 81.63 years; however, this number decreases to 75.5 years for Indigenous people in the country. [ 4 ]

  5. e (mathematical constant) - Wikipedia

    en.wikipedia.org/wiki/E_(mathematical_constant)

    If the interest is credited twice in the year, the interest rate for each 6 months will be 50%, so the initial $1 is multiplied by 1.5 twice, yielding $1.00 × 1.5 2 = $2.25 at the end of the year. Compounding quarterly yields $1.00 × 1.25 4 = $2.44140625, and compounding monthly yields $1.00 × (1 + 1/12) 12 = $2.613035....

  6. Interval (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Interval_(mathematics)

    For example, the set of real numbers consisting of 0, 1, and all numbers in between is an interval, denoted [0, 1] and called the unit interval; the set of all positive real numbers is an interval, denoted (0, ∞); the set of all real numbers is an interval, denoted (−∞, ∞); and any single real number a is an interval, denoted [a, a].

  7. Climate sensitivity - Wikipedia

    en.wikipedia.org/wiki/Climate_sensitivity

    The magnitude of a forcing is specific to the physical driver and is defined relative to an accompanying time span of interest for its application. [7] In the context of a contribution to long-term climate sensitivity from 1750 to 2020, the 50% increase in atmospheric CO 2 is characterized by a forcing of about +2.1 W/m 2. [8]

  8. Life extension - Wikipedia

    en.wikipedia.org/wiki/Life_extension

    For instance, a 2020 study indicates that the global mean loss of life expectancy (LLE) from air pollution in 2015 was 2.9 years, substantially more than, for example, 0.3 years from all forms of direct violence, albeit a significant fraction of the LLE (a measure similar to years of potential life lost) is considered to be unavoidable.

  9. Radiative forcing - Wikipedia

    en.wikipedia.org/wiki/Radiative_forcing

    Radiative forcing is defined in the IPCC Sixth Assessment Report as follows: "The change in the net, downward minus upward, radiative flux (expressed in W/m 2) due to a change in an external driver of climate change, such as a change in the concentration of carbon dioxide (CO 2), the concentration of volcanic aerosols or the output of the Sun." [3]: 2245