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  2. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    Visualization with paper sizes in formats A0 to A8, exhibited at the science museum CosmoCaixa Barcelona An A4 paper sheet folded into two A5 size pages. ISO 216 is an international standard for paper sizes, used around the world except in North America and parts of Latin America.

  3. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    If one accepts some trimming, the size is indeed one quarter of the old Imperial paper size known as Demy, 17 + 1 ⁄ 2 in × 22 + 1 ⁄ 2 in (444 mm × 572 mm). [ 29 ] Manufacturers of computer printers, however, recognize inch-based Quarto as 10 + 5 ⁄ 6 or 10.83 in (275 mm) long.

  4. Polystyrene - Wikipedia

    en.wikipedia.org/wiki/Polystyrene

    Sheets of EPS are commonly packaged as rigid panels (common in Europe is a size of 100 cm x 50 cm, usually depending on an intended type of connection and glue techniques, it is, in fact, 99.5 cm x 49.5 cm or 98 cm x 48 cm; less common is 120 x 60 cm; size 4 by 8 ft (1.2 by 2.4 m) or 2 by 8 ft (0.61 by 2.44 m) in the United States). Common ...

  5. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    The first contact lenses were made of glass, in 1888. Initially the glass was blown but soon lenses were made by being ground to shape. For the first fifty years, glass was the only material used. The lenses were thin, yet reports of injury were rare. In 1938 perspex (polymethylmethacrylate, or PMMA) began to replace glass in contact lens ...

  6. List of countries with highest military expenditures - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_with...

    The first list is based on the Stockholm International Peace Research Institute (SIPRI) fact sheet, which includes a list of the world's top 40 military spenders as of 2023, based on current market exchange rates.

  7. List of thermal conductivities - Wikipedia

    en.wikipedia.org/wiki/List_of_thermal_conductivities

    Kozak grain sizes ranged from 0.3 to 1 mm diameter and the density was 0.54 grams ⋅ cm −3. Kozak, M.I. Zhur. Tekh. Fiz., 22 (1), 73–6, 1952. By comparison Sinel'nikov powder is a powder in a vacuum, gran sizes range from 100 to 200 micrometers, the powder density is 1.35 g per cm −3 .