1.1Units and Dimensions
The most two commonly used systems of units:
•SI, System International units.
•AE, American Engineering system units.
Dimensions and units are classified to:
•Fundamental (basic) dimensions/units: It can be measured independently and are sufficient to describe essential physical quantities (meter, kilogram, second, Kelvin, mole, .. etc).
•Derived dimensions/units: It can be developed in terms of the fundamental dimensions/units (joule, newton, watt,
Questions 1. What does ms mean? means millisecond. 2. What does (m) (s) or m.s ? means meter seconds. Note: 1 Mm is not 1mm. 3. Which of the following best represents the force needed to lift a heavy suitcase: a. 25 N b. 25 kN c. 250 N d. 250 kN 4. A watt is: a. One joule per second b. equal to 1 (kg)(m2)/s2 c. the unit for all types of power d. all of the above e. none of the above 5. Is kg/s a basic or derived unit in SI?
Questions 1. What does ms mean? means millisecond. 2. What does (m) (s) or m.s ? means meter seconds. Note: 1 Mm is not 1mm. 3. Which of the following best represents the force needed to lift a heavy suitcase: a. 25 N b. 25 kN c. 250 N d. 250 kN 4. A watt is: a. One joule per second b. equal to 1 (kg)(m2)/s2 c. the unit for all types of power d. all of the above e. none of the above 5. Is kg/s a basic or derived unit
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
الرجوع الى لوحة التحكم
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