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1. Vectors and scalars
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Even though we have said that all vectors have length and direction, there is one exception: the zero vector. The zero vector 0 is the vector from a point A to the same point A. We can write
0 = The zero vector does not have a direction but it does have a length; not surprisingly, its length is 0. Thus we can write |0| = 0.
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no matter where the point © 2002-09 The University of Sydney. Last updated: 09 November 2009
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