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godorovg Group Title

anyone feeling lucky tonight? I need another way to understand dot product rule in vectors?

  • one year ago
  • one year ago

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  1. Kainui Group Title
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    Well in what way do you understand the dot product rule as it stands? lol

    • one year ago
  2. godorovg Group Title
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    that is what I am asking to see if I get a better grip on this from what a with roof plus b with roof = c roof that is what the dot rule is right??

    • one year ago
  3. godorovg Group Title
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    I can not draw on this board I am really bad at it..

    • one year ago
  4. Kainui Group Title
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    |dw:1345012754225:dw| That? That doesn't look like a product to me, looks like a sum.

    • one year ago
  5. godorovg Group Title
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    okay, than I have this mixed up help me to get this straight plz

    • one year ago
  6. borcarlo Group Title
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    |dw:1345012796701:dw|

    • one year ago
  7. borcarlo Group Title
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    I don't know if I'm answering your question, hope it helps.

    • one year ago
  8. godorovg Group Title
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    the sum rule is what I posted the first time, why is this called the dot rule?"

    • one year ago
  9. godorovg Group Title
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    I know using this the dot you dots, but why? dots mostly means times in math.

    • one year ago
  10. borcarlo Group Title
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    Ok, so be clearer with your question.

    • one year ago
  11. Kainui Group Title
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    The dot product is \[A*B=ABcos \theta \] while the cross product is \[AxB=ABsin \theta \]

    • one year ago
  12. godorovg Group Title
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    sorry I am trying too, here this is still new to me bare with me. Sorry if I have caused problems here or anything.

    • one year ago
  13. borcarlo Group Title
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    No but the thing is we don't to understand your question, actually I don't.

    • one year ago
  14. borcarlo Group Title
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    seem*

    • one year ago
  15. godorovg Group Title
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    I am trying to put this in words, I am not not using the right words here. The dot product is A∗B=ABcosθ this is what I am asking for and why and help me to understand the concept here

    • one year ago
  16. borcarlo Group Title
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    Imagine you have a vector say (1, 2)=a right, the length 2 is the portion of (1,2) on the y axis. There I took the dot product a°y^= (0,2) . So the dot product allows you make that same thing with any vector.

    • one year ago
  17. Kainui Group Title
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    I learned it in terms of flux. How many field lines are going through an area, for instance. So let's look at the two extremes. Remember that an area's vector is pointing out, perpendicular to the length and width of it. |dw:1345014748903:dw| So here we see on the left that the cosine of the angle between the two is 0, and the cosine of 0 is 1. So we have 100% flux through the area of electric field lines. Now in the right side we see that the electric field lines are going perpendicular to the area, so none of the field lines are traveling through the area. Cosine of 90 degrees is indeed 0, so we see there is no flux.

    • one year ago
  18. godorovg Group Title
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    thanks

    • one year ago
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