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  2. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    2.817 940 285 (31) × 10 −15 [13] The Compton wavelength of the electron λ C: 2.426 310 215 (18) × 10 −12 [13] The reduced Compton wavelength of the electron λ C: 3.861 592 6764 (18) × 10 −13 [14] The Compton wavelength (or reduced Compton wavelength) of any fundamental particle λ x: The Bohr radius of the hydrogen atom (Atomic unit ...

  3. Length measurement - Wikipedia

    en.wikipedia.org/wiki/Length_measurement

    Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light. Surveying is one ancient use of measuring long ...

  4. Ethiopian units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ethiopian_units_of_measurement

    A common unit of weight in Ethiopia was the load - a simple measure of the amount carried by a beast of burden such as a camel [1] A number of different units of measurement have been used in Ethiopia. The values of most of these units are not well defined. [2] In 1963, Ethiopia adopted the metric system. [3]

  5. Federal Board of Intermediate and Secondary Education

    en.wikipedia.org/wiki/Federal_Board_of...

    The FBISE was established under the FBISE Act 1975. [2] It is an autonomous body of working under the Ministry of Federal Education and Professional Training. [3] The official website of FBISE was launched on June 7, 2001, and was inaugurated by Mrs. Zobaida Jalal, the Minister for Education [4] The first-ever online result of FBISE was announced on 18 August 2001. [5]

  6. Unit of measurement - Wikipedia

    en.wikipedia.org/wiki/Unit_of_measurement

    The former Weights and Measures office in Seven Sisters, London Units of measurement, Palazzo della Ragione, Padua. A unit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity. [1]

  7. Length - Wikipedia

    en.wikipedia.org/wiki/Length

    Length is a measure of distance. In the International System of Quantities , length is a quantity with dimension distance. In most systems of measurement a base unit for length is chosen, from which all other units are derived.