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  2. General Motors Atlas engine - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Atlas_engine

    The LLR (also called Vortec 3700), is a straight-5 DOHC engine produced from 2007 through 2012. It displaces 3.7 L; 222.9 cu in (3,653 cc), courtesy of a larger 95.5 mm (3.76 in) bore while keeping the 102 mm (4.02 in) stroke. The LLR also corrected the head issue found in the L52.

  3. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.

  4. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  5. Leibniz formula for π - Wikipedia

    en.wikipedia.org/wiki/Leibniz_formula_for_π

    In mathematics, the Leibniz formula for π, named after Gottfried Wilhelm Leibniz, states that = + + = = +,. an alternating series.. It is sometimes called the Madhava–Leibniz series as it was first discovered by the Indian mathematician Madhava of Sangamagrama or his followers in the 14th–15th century (see Madhava series), [1] and was later independently rediscovered by James Gregory in ...

  6. Mean effective pressure - Wikipedia

    en.wikipedia.org/wiki/Mean_effective_pressure

    BMEP typical values [5] Engine type Typical max. BMEP Motorbike engine 1.2 MPa (174.0 lbf/in 2) Race car engine (NA Formula 1) 1.6 MPa (232.1 lbf/in 2) Passenger car engine (naturally aspirated Otto) 1.3 MPa (188.5 lbf/in 2) Passenger car engine (turbocharged Otto) 2.2 MPa (319.1 lbf/in 2) Passenger car engine (turbocharged Diesel)

  7. Circumference - Wikipedia

    en.wikipedia.org/wiki/Circumference

    In Measurement of a Circle written circa 250 BCE, Archimedes showed that this ratio (written as /, since he did not use the name π) was greater than 3 ⁠ 10 / 71 ⁠ but less than 3 ⁠ 1 / 7 ⁠ by calculating the perimeters of an inscribed and a circumscribed regular polygon of 96 sides. [9]

  8. Compression ratio - Wikipedia

    en.wikipedia.org/wiki/Compression_ratio

    For example, if the static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 1.3 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength.

  9. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.