Recent content by mgier001

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    Tricky circular area math problem from the GRE

    Do you mind explaining the equation? I would have subtracted 3y and added 2z. x-3y+2z
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    Tricky circular area math problem from the GRE

    Well the area of each circle x=40, and intersection y=15. However, z is not given. I would guess z to be 7.5, but I don't want to simply guess an answer. Solving with 7.5 yields: 15+(40-(2x15)-7.5) = 17.5
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    Tricky circular area math problem from the GRE

    Is this thread misposted? I'm not sure if this problem would fall under a homework/coursework category since it technically is not homework or coursework... :\
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    Tricky circular area math problem from the GRE

    Hey guys, I was wondering if anyone could help me out with this problem from the GRE practice exam: I honestly don't know how to go about solving it. I'm guessing that the answer is either B or D, however I know that in this GRE exam you can never guess... My friends think the answer is...
  5. M

    Equilibrium of Rigid Bodies Problem

    Unfortunately my geometry seems to be lacking, and that's why I'm no understanding how to get the dimensions. Also, I spent a great amount of time already studying the solutions drawing and still couldn't understand :(. Do you mind taking me step by step showing how the sin and cos are used for...
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    Equilibrium of Rigid Bodies Problem

    I know this thread is, well... ancient. But I have this problem assigned for homework, and I understand all about moment and that type of thing. My problem is that I don't understand how a1 and a2 are derived in the solutions manual. a1=20sin(alpha)-8cos(alpha) a2=32cos(alpha)-20sin(alpha)...
  7. M

    Problem with an Undamped Forced Motion

    I actually ended up getting y=(e^(-2x))((8/17)sin(4x)+(16/17)cos(4x))+(1/17)e^(-x) I hope this is right :).
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    Problem with an Undamped Forced Motion

    Also, the graph I got from my general solution is provided by this link: "[URL [Broken]
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    Problem with an Undamped Forced Motion

    I did some more work, can someone verify that this is correct please? :) Thanks.
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    Problem with an Undamped Forced Motion

    I managed to find c1=1/2 c2=1 So yc=e-2t((1/2)sin4t+cos4t) Now what to do :confused:
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    Problem with an Undamped Forced Motion

    My professor assigned us a problem where m=16 lb k=10 lb/ft a=2 t(0)=1 ft t'(0)=0 ft/sec Through this I determined the DE x''(t)+4x'(t)+20x(t)=e-t with initial conditions mentioned above. Using the method of m2+4m+20=0 I got roots of -2±4i Therefore, my...
  12. M

    % H2O of hydration unknown?

    Hi everyone, I'm new to this forum (this is actually my first post!). (PS. I'm not completely sure if this is the right place to post this thread because it said do not post homework questions... I'm not really sure if I am to call this a homework assignment though, or a homework related...
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