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  1. J

    Basic ODE question

    y'=1=[2/root(x+2)] Then I plugged it into the original and got both sides to equal. BUT I still have no idea what the original question is actually asking me to do in each part?
  2. J

    Basic ODE question

    Just started Engineering Math III and have a question. Sorry about the notation, our library computers have scripts disabled. My math prof does a poor job of explaining the concepts. Help me out! Homework Statement Verify the indicated function y=phi(x) is an explicit solution of the...
  3. J

    Plane to Ship Displacement (using component method)

    Makes sense. Thanks again for the help! :)
  4. J

    Plane to Ship Displacement (using component method)

    Yeah I did draw a diagram, I just don't have a scanner to upload it. I never thought to look at it as two triangles though. So what I actually should have is: Shipx=15.4sin57 = 12.9i Shipy=15.4cos57 = -8.39j Planex=19.4sin30 = 9.7i km Planey=19.4cos30 = -16.8j km Planez=2.06k km Therefore...
  5. J

    Plane to Ship Displacement (using component method)

    Really? So Sin is for the X direction, and cos is for the Y? That's not what my textbook says?
  6. J

    Plane to Ship Displacement (using component method)

    Homework Statement A coastguard station locates a ship at range 15.4 km and bearing 123° clockwise from north. From the same station a plane is at horizontal range 19.4 km, 150° clockwise from north, with elevation 2.06 km. What is the vector displacement from plane to ship, let i represent...
  7. J

    Functions 12U - Basic Polynomial questions

    Righto I missed that one, so the next lines should be: 2016 = x^3 + 25x^2 + 150x + 500 0 = x^3 + 25x^2 + 150x -1516 Then I would just use factor theorem to solve for x, does that work out in this case?
  8. J

    Functions 12U - Basic Polynomial questions

    Alright, thanks for the help :) Typo on the first one, let me try again ;) Problem One 1008 = [(10+x)(10+x)(5+x)] / 2 Solution Attempt 504=[(10+x)(10+x)(5+x)] 504= (100+10x+10x+x^2)(5+x) 504= 500 + 50x + 5x^2 + 100x + 20x^2 + x^3 504 = x^3 + 25x^2 + 150x + 500 0 = x^3 +...
  9. J

    Functions 12U - Basic Polynomial questions

    Problem One 1008 = [(10+x)(10+x)(5+x)] / 2 Solution Attempt 5004=[(10+x)(10+x)(5+x)] 5004= (100+10x+10x+x^2)(5+x) 5004= 500 + 50x + 5x^2 + 100x + 20x^2 + x^3 5004 = x^3 + 25x^2 + 150x + 500 0 = x^3 + 25x^2 + 150x - 4504 Where do I go from here? Problem Two Solve. x^4 -...
  10. J

    Grade 12U Calculus - Algebraic Vectors+Cross&Dot Product

    Thanks again Tedjn. I totally forgot about the https://www.physicsforums.com/latex_images/17/1740837-11.png [Broken] My test is in about half an hour, i'm just reviewing my stuff now.
  11. J

    Grade 12U Calculus - Algebraic Vectors+Cross&Dot Product

    Thanks everyone for your help. Especially Tedjn for all that typing! I'm still completely lost on 12b,12c and 14. What you typed doesn't even makes sense to me :confused: Anyways, at least i'm better off then I was before I posted here, even if I couldn't figure everything out. I attribute it...
  12. J

    Grade 12U Calculus - Algebraic Vectors+Cross&Dot Product

    Why (4/21)? Where did that come from?
  13. J

    Grade 12U Calculus - Algebraic Vectors+Cross&Dot Product

    Hey guys, I know i've left it kind of late, but I have a calc. unit test tomorrow at 10AM. I was doing the assigned review, and some extra questions of top of it, and these ones are still giving me trouble. Any help at all you could offer would be greatly appreciated, as I have to pull my...
  14. J

    Draw Shapes

    I'm not sure, i'd stick with photoshop.
  15. J

    You tube video question

    Re-upload it. Or just wait for YouTube to update its search data?
  16. J

    New Ubuntu 8.04 released

    I got free Ubuntu CDs from their site, but i've yet to install it.
  17. J

    Wireless Network

    I keep all my stuff open, except for a firewall to the internet. My router doesn't transmit much outside my walls, so i'm not worried :)
  18. J

    Going to school next year: need a laptop

    Get a mac. Reliable, which is important for class data.
  19. J

    I need help deleting the virus Command Service!

    Yeah, if you don't want to pay, AdAware is free :)
  20. J

    Help me….my hard disk is damaged

    It sucks to loose data, good luck!
  21. J

    Internet Explorer, Saving Passwords

    I think these guys got it covered. Or just switch to firefox
  22. J

    Help me with these four questions. midterm study. Physics12

    Thanks guys for the help. I ended up having something similar to 1 on my test today. Number 4 was identical actually! I nailed 1. 100%. Number 4 i'm not so sure about. I drew a FBD, but got confused because the angle of 28 degrees was 4m out from the center of the platform. I calculated a new...
  23. J

    Help me with these four questions. midterm study. Physics12

    Oh, i missed that part! Sort of like trick wording in there! Thanks :)
  24. J

    Help me with these four questions. midterm study. Physics12

    My midterm is tomorrow guys. If you can't, or dont' want to solve the questions even after i've attempted them to the best of my ability, then can you offer any tips to completing them?
  25. J

    Help me with these four questions. midterm study. Physics12

    Yeah, i meant to say "get acceleration using a=4pi^2r / T^2"
  26. J

    Help me with these four questions. midterm study. Physics12

    Thanks for the welcome! I'm not really sure where to start at all on these ones, but i'll give it a shot: 1. I know i have to get the horizontal component of acceleration, and I think I have to use \sumFr=ma but I don't know how? 2. I'm completely confused on this one as I wasn't given...
  27. J

    Help me with these four questions. midterm study. Physics12

    I've been doing alot of extra questions for physics lately, but I just can't wrap my head around these questions. I've attempted a alot of others, but these just seem different for some reason? Please help me solve them, including Free Body Diagrams if possible. 1. If a curve with a radius of...
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