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  2. Reciprocal length - Wikipedia

    en.wikipedia.org/wiki/Reciprocal_length

    Spatial frequency is a reciprocal length, which can thus be used as a measure of energy, usually of a particle. For example, the reciprocal centimetre, cm1, is an energy unit equal to the energy of a photon with a wavelength of 1 cm. That energy amounts to approximately 1.24 × 10 −4 eV or 1.986 × 10 −23 J.

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    5 cm – height of a hummingbird, the smallest-known bird; 5.08 cm – 2 inches, 5.5 × 5.5 × 5.5 cm – dimensions of a 3x3x3 Rubik's cube; 6.1 cm – average height of an apple; 7.3–7.5 cm – diameter of a baseball [28] 8.6 cm × 5.4 cm – dimensions of a standard credit card (also called CR80) [116] [117] 9 cm – length of a speckled ...

  4. Cun (unit) - Wikipedia

    en.wikipedia.org/wiki/Cun_(unit)

    In the twentieth century in the Republic of China, the lengths were standardized to fit with the metric system, and in current usage in People's Republic of China and Taiwan [citation needed] it measures ⁠3 + 1 / 3 ⁠ cm (~1.312 in). In Japan, the corresponding unit, sun (寸), was standardized at 1000 ⁄ 33 mm (3. 03 cm, ~1.193 in, or ~0. ...

  5. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    The United States retained the ⁠ 1 / 39.37 ⁠-metre definition for surveying, producing a 2 millionth part difference between standard and US survey inches. [47] This is approximately ⁠ 1 / 8 ⁠ inch per mile; 12.7 kilometres is exactly 500,000 standard inches and exactly 499,999 survey inches.

  6. Centimetre - Wikipedia

    en.wikipedia.org/wiki/Centimetre

    The microwave is in-between 1 meter to 1 millimeter. A centimetre or centimeter (US/Philippine spelling), with SI symbol cm, is a unit of length in the International System of Units (SI) equal to one hundredth of a metre, centi being the SI prefix for a factor of ⁠ 1 / 100 ⁠. [1] Equivalently, there are 100 centimetres in 1 metre.

  7. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    1:36: 8.467 mm Popular scale for period ship plans — 1 inch = 3 feet. 1:35: 8.709 mm: Military models: The most popular scale for military vehicles and figures. Used heavily in models of armoured vehicles. It was originally conceived by Tamiya for convenience of fitting motorised parts and batteries. Corresponds well with 54mm figures. 1:34: ...

  8. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    For example, 1/2.5 converts to 2/5 as a simple fraction, or 0.4 as a decimal number. This "inch" system gives a result approximately 1.5 times the length of the diagonal of the sensor. This "inch" system gives a result approximately 1.5 times the length of the diagonal of the sensor.

  9. U.S. standard clothing size - Wikipedia

    en.wikipedia.org/wiki/U.S._standard_clothing_size

    With the average American woman's height (20 years and older) at about 5 ft 4 in (162.1 cm) (Department of Health 2012), both standard and catalog size ranges attempt to address a variety of weights or builds as well as providing for the "shorter-than-average" height woman with "petite" and "half-sizes". However "taller-than-average" women may ...