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  2. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Derived from the used of 10 yards to 1 inch. Works well with 5mm miniatures where a 6' man equals 5.08 mm 1:350: 0.871 mm: Ship models: Though assumed to be a Japanese size for ship models, its origin lies in the UK, with the release of the 1:350 Javelin and Tribal Destroyer kit in December 1945 in the FROG Penguin range.

  3. HO scale - Wikipedia

    en.wikipedia.org/wiki/HO_scale

    HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world. [1] [2] The rails are spaced 16.5 millimetres (0.650 in) apart for modelling 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge tracks and trains in HO.

  4. Light-year - Wikipedia

    en.wikipedia.org/wiki/Light-year

    The largest unit for expressing distances across space at that time was the astronomical unit, equal to the radius of the Earth's orbit at 150 million kilometres (93 million miles). In those terms, trigonometric calculations based on 61 Cygni's parallax of 0.314 arcseconds, showed the distance to the star to be 660 000 astronomical units (9.9 ...

  5. Metrication in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Metrication_in_the_United...

    The report showed that 98.7% of 100,938 responses preferred the metric system; 17.6% wanted a purely metric system whereas 81.1% opted for the status quo (being as per the current legislation, which is imperial units can be displayed only as optional, less prevalent, supplementary units).

  6. Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Mercator_projection

    With radius and great circle circumference equal to 6,371 km and 40,030 km respectively an RF of ⁠ 1 / 300M ⁠, for which R = 2.12 cm and W = 13.34 cm, implies that a ruler measurement of 3 mm. in any direction from a point on the equator corresponds to approximately 900 km. The corresponding distances for latitudes 20°, 40°, 60° and 80 ...

  7. Resistor - Wikipedia

    en.wikipedia.org/wiki/Resistor

    Such meters are adapted to the shunt full current rating by using an appropriately marked dial face; no change need to be made to the other parts of the meter. Grid resistor In heavy-duty industrial high-current applications, a grid resistor is a large convection-cooled lattice of stamped metal alloy strips connected in rows between two electrodes.

  8. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    A good example of this a 4×6 print (6 inch wide by 4 inch tall landscape) perfectly matches the 3:2 aspect ratio of a DSLR/35 mm, since 6/2=3 and 4/2=2. For analog projection of photographic slides, projector and screen use a 1:1 aspect ratio, supporting horizontal and vertical orientation equally well.

  9. Specific modulus - Wikipedia

    en.wikipedia.org/wiki/Specific_modulus

    Specific modulus is a materials property consisting of the elastic modulus per mass density of a material. It is also known as the stiffness to weight ratio or specific stiffness.