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  2. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Tungsten (also called wolfram) [14] [15] is a chemical element; it has symbol W and atomic number 74. It is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783.

  3. Isotopes of tungsten - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_tungsten

    Naturally occurring tungsten (74 W) consists of five isotopes.Four are considered stable (182 W, 183 W, 184 W, and 186 W) and one is slightly radioactive, 180 W, with an extremely long half-life of 1.8 ± 0.2 exayears (10 18 years).

  4. List of computer algebra systems - Wikipedia

    en.wikipedia.org/wiki/List_of_computer_algebra...

    Wolfram Alpha: Wolfram Research: 2009 2013: Pro version: $4.99 / month, Pro version for students: $2.99 / month, ioRegular version: free Proprietary: Online computer algebra system with step-by step solutions. Xcas/Giac: Bernard Parisse 2000 2000 1.9.0-99: May 2024: Free GPL: General CAS, also adapted for the HP Prime. Compatible modes for ...

  5. Toyota ZZ engine - Wikipedia

    en.wikipedia.org/wiki/Toyota_ZZ_engine

    The 1ZZ-FE is a 1.8 L (1,794 cc) version.Bore x stroke of 79 mm × 91.5 mm (3.11 in × 3.60 in). Compression ratio is 10.0:1. It uses MPFI, has VVT-i (1998-99 1ZZ engines don't have VVT-i), and features fracture-split forged powder metal connecting rods, one-piece cast camshafts, and either a cast aluminum intake manifold or a molded plastic intake manifold.

  6. Mitsubishi 4G9 engine - Wikipedia

    en.wikipedia.org/wiki/Mitsubishi_4G9_engine

    The 4G91 uses a bore and stroke of 78.4 mm × 77.5 mm (3.09 in × 3.05 in) for a total displacement of 1.5 L (1,496 cc). With a 9.5:1 compression ratio and DOHC, four-valve-per-cylinder head and multi-point EFI, this engine produces 115 PS (85 kW; 113 hp) at 6,000 rpm and 135 N⋅m (100 lb⋅ft) at 5,000 rpm. [1]

  7. ∆ - Wikipedia

    en.wikipedia.org/wiki/%E2%88%86

    ∆ may refer to: . Triangle (∆), one of the basic shapes in geometry. Many different mathematical equations include the use of the triangle.; Delta (letter) (Δ), a Greek letter also used in mathematics and computer science

  8. Rottweil – Tuttlingen - Wikipedia

    en.wikipedia.org/wiki/Rottweil_–_Tuttlingen

    Download QR code; Print/export Download as PDF; Printable version; In other projects ... Wolfram Fischer 2,296 1.6 0.6 2,080 1.5 0.2 FW: Hans-Gerd Hoffmann 1,992 1.4

  9. Exponential integral - Wikipedia

    en.wikipedia.org/wiki/Exponential_integral

    Plot of the exponential integral function E n(z) with n=2 in the complex plane from -2-2i to 2+2i with colors created with Mathematica 13.1 function ComplexPlot3D