EM306_Quiz0_ans

# EM306_Quiz0_ans - EM306 Quiz #1 September 2008 Name:_...

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EM306 Quiz #1 September 2008 Name:________________________ Section:_______________ 1. What is a vector? A mathematical quantity that has both magnitude and direction. 2. Let r be a vector quantity. If r = | r |, what does r represent? The magnitude of the vector. 3. If y = r r , what does y represent? A vector with unit magnitude in the direction of the vector. 4. What is a scalar? A quantity having only magnitude. Given two vectors a = i + 2 j + 3 k and b = 2 i + j + 2 k : 5. What is the sum of these two vectors? 3 i + 3j + 5 k 6. What is the dot product of these two vectors? 10 7. What is the cross product a ! b of these two vectors? i + 4j – 3 k

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Units 8. What is the SI system of units? SI stands for International System, the most widely accepted system of standard units in the world. We know that a meter is a unit of length. More specifically, meter is the unit of measure and length is the physical quantity we are measuring. What is the physical quantity we are measuring for each of the following units? 9.
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## This note was uploaded on 09/28/2008 for the course E M 306 taught by Professor Landis during the Spring '08 term at UT Arlington.

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EM306_Quiz0_ans - EM306 Quiz #1 September 2008 Name:_...

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