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Unit Vectors and Engineering Notation http://www.khanacademy.org/video/unit-vectors-and-engineering-notation ---------------------------------------------------------------- يتناول هذا الفيديو شرحا لمتجهات الوحدة من خلال طرح امثلة ---------------------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org