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  2. Tetragonal crystal system - Wikipedia

    en.wikipedia.org/wiki/Tetragonal_crystal_system

    An example of the tetragonal crystals, wulfenite Two different views (top down and from the side) of the unit cell of tP30-CrFe (σ-phase Frank–Kasper structure) that show its different side lengths, making this structure a member of the tetragonal crystal system.

  3. Unit of volume - Wikipedia

    en.wikipedia.org/wiki/Unit_of_volume

    A unit of volume is a unit of measurement for measuring volume or capacity, the extent of an object or space in three dimensions. Units of capacity may be used to ...

  4. Nessler cylinder - Wikipedia

    en.wikipedia.org/wiki/Nessler_cylinder

    Nessler cylinders (also named color comparison cylinders or color comparing cylinders) are laboratory tubes with a fixed volume, made of glass with optically plane bottom. On the walls, there are marks of the nominal stroke volume (usually 100 ml) and possibly one halfway mark (usually 50 ml). Nessler cylinders with a capacity of 100 cc and 50 cc

  5. Prism (geometry) - Wikipedia

    en.wikipedia.org/wiki/Prism_(geometry)

    The volume of a prism is the product of the area of the base by the height, i.e. the distance between the two base faces (in the case of a non-right prism, note that this means the perpendicular distance). The volume is therefore: =, where B is the base area and h is the height.

  6. Tesseract - Wikipedia

    en.wikipedia.org/wiki/Tesseract

    Perspective with hidden volume elimination. The red corner is the nearest in 4D and has 4 cubical cells meeting around it. The tetrahedron forms the convex hull of the tesseract's vertex-centered central projection.

  7. On the Sphere and Cylinder - Wikipedia

    en.wikipedia.org/wiki/On_the_Sphere_and_Cylinder

    The ratio of the volume of a sphere to the volume of its circumscribed cylinder is 2:3, as was determined by Archimedes. The principal formulae derived in On the Sphere and Cylinder are those mentioned above: the surface area of the sphere, the volume of the contained ball, and surface area and volume of the cylinder.

  8. Soma cube - Wikipedia

    en.wikipedia.org/wiki/Soma_cube

    The pieces of a Soma cube The same puzzle, assembled into a cube. The Soma cube is a solid dissection puzzle invented by Danish polymath Piet Hein in 1933 [1] during a lecture on quantum mechanics conducted by Werner Heisenberg.

  9. Heptagonal prism - Wikipedia

    en.wikipedia.org/wiki/Heptagonal_prism

    The volume is found by taking the area of the base, with a side length of and apothem , and multiplying it by the height , giving the formula: [1] = This formula also ...