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  2. 2-10-4 - Wikipedia

    en.wikipedia.org/wiki/2-10-4

    These came with 74 in (1,880 mm) diameter drivers and 310 psi (2.1 MPa) boiler pressure, making these ATSF 2-10-4 s the fastest and most modern of all. Of the original order of ten, five were oil-burning and five coal-burning, but when Santa Fe ordered 25 more for delivery in 1944, all were delivered equipped to burn oil.

  3. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin( α + β ) = sin α cos β + cos α sin ...

  4. Parau na te varua ino - Wikipedia

    en.wikipedia.org/wiki/Parau_na_te_varua_ino

    Parau na te varaua ino is an 1892 oil on canvas painting by Paul Gauguin, produced during the artist's first stay on Tahiti.It is now in the National Gallery of Art. The painting is divided in half by the same tree-root as appears in his Fatata te Miti, with greens and blacks in the top half and pinkish shades in the bottom half.

  5. USRA Light Santa Fe - Wikipedia

    en.wikipedia.org/wiki/USRA_Light_Santa_Fe

    These locomotives were of 2-10-2 wheel arrangement in the Whyte notation, or 1′E1′ in UIC classification; this arrangement was commonly named "Santa Fe" in the United States. At the time, the Santa Fe was the largest non- articulated type in common use, primarily in slow drag freight duty in ore or coal service.

  6. Pentation - Wikipedia

    en.wikipedia.org/wiki/Pentation

    The first three values of the expression x[5]2. The value of 3[5]2 is 7 625 597 484 987; values for higher x, such as 4[5]2, which is about 2.361 × 10 8.072 × 10 153 are much too large to appear on the graph. In mathematics, pentation (or hyper-5) is the fifth hyperoperation.

  7. Multiplex locomotive - Wikipedia

    en.wikipedia.org/wiki/Multiplex_locomotive

    There was a Belgian project for a hexaplex locomotive for the Russian market, based on the Franco-Crosti quadruplex locomotive built for the Belgian State Railways. It had the wheel arrangement 2-4-4-2+2-8-8-2+2-4-4-2 and made full use of the Russian loading gauge and broad gauge. The total weight of the 43-metre-long locomotive was to be 410 ...

  8. N,N'-Di-2-butyl-1,4-phenylenediamine - Wikipedia

    en.wikipedia.org/wiki/N,N'-Di-2-butyl-1,4...

    N,N′-Di-2-butyl-1,4-phenylenediamine has the appearance of a red liquid. It is a skin sensitizer and can be absorbed through skin. It is toxic. N,N′-Di-2-butyl-1,4-phenylenediamine is the active component of e.g. AO-22, AO-24, AO-29, and VANLUBE antioxidant mixtures, and Santoflex 44PD inhibitor.

  9. Four fours - Wikipedia

    en.wikipedia.org/wiki/Four_fours

    For example, when d=4, the hash table for two occurrences of d would contain the key-value pair 8 and 4+4, and the one for three occurrences, the key-value pair 2 and (4+4)/4 (strings shown in bold). The task is then reduced to recursively computing these hash tables for increasing n , starting from n=1 and continuing up to e.g. n=4.