1. The quantity and unit of length Long magnitude has units of meters with the symbol (m). According to the approval of the General Conference des Poid et Mesures / CGPM 11th 1963. The long-distance meter is a unit that is 1,650,763.73 times the wavelength in vacuum of the radiation krypton-86 atom. Figure 1.2 length measuring instrument 2. The quantity ...
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