Recent content by bobby13

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    Subspaces, R^n How to visualize?

    Thnx! I think I am starting to get the hang of this stuff, after constantly and constantly reading over notes and trying examples. Quick question. In one example it says, Let U = { X in R^n | AX = 0 (Zero Vector)} Is U a subspace? Am I correct in reading the question as, X is in R^n if...
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    Subspaces, R^n How to visualize?

    Hey, I have no problems dealing with vectors in space, R^3. But I am having a lot of trouble with vectors in R^n. One of my basic questions is what is R^n. I mean doesn't the vector space already encompass everything? How do I visualize R^n vectors? Can you reccomend any good online tutorials...
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    Concept MC Questions - Clarifying Earth's Rotation & Ladder Friction in Space

    Hi, I have some review multiple choice questions, and some of them, I can't understand why the answer is so. If you could clarify the concepts, that'd be great! Which statement best describes the Earth’s rotation about its axis? a)The tangential velocity is the same at all points on the...
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