Recent content by micaele

  1. M

    Irreducibility and finite fields

    yeah you're completely right and i noticed my mistake right after i posted that. i overlooked the whole extended element thing. my bad.
  2. M

    Irreducibility and finite fields

    For part i: Because this is a finite field, you must show that the polynomial g(X) has no roots in k. Because k is a finite field of 2 elements, you can just try plugging in 0 and 1 because k = {0,1}. So g(X) is irreducible if and only if 0^2-T is not equal to zero and 1^2-T is not equal...
  3. M

    How to find limit of arithmetic series?

    the above poster didn't say it, so i will because it just helped me while doing my calculus homework here: thanks
  4. M

    Sciam Partnership: Member Discount

    So when I ask for my subscription, how exactly do I let them know that I am a PF member so that I can get the great discount?
  5. M

    College Physics 1 - Composition of Forces

    its very rare around here that i get to help out, so here i go: http://img144.imageshack.us/img144/830/39461219yw3.png [Broken] as for the law of sines bit, your formula in there is 100% right, but for the real answer you want to use the new number you get from plugging in whatever i just gave...
  6. M

    Understanding Vector Components: Explaining an Inclined Plane Physics Question

    THAT'S the reason! Thank you, that completely did not occur to me. I understand now, thanks.
  7. M

    Understanding Vector Components: Explaining an Inclined Plane Physics Question

    So I was watching some of those physics videos posted in schoolwork board, and although he probably didn't make an error here, I don't think I understand it. Here's the pictues. I'll elaborate after it so you guys know what I'm talking about...
  8. M

    Solving Work Energy Problems: Calculating Distance Using Friction and Velocity

    I understand — thanks. If I get stuck anywhere else I'll be sure to make a new thread. Thanks for your help everybody.
  9. M

    Solving Work Energy Problems: Calculating Distance Using Friction and Velocity

    So anything at all can do work? And in this case, the friction does the work because it forces an object to slow over a certain distance, meanwhile the object just relaxes while the friction does all of the work for it?
  10. M

    Solving Work Energy Problems: Calculating Distance Using Friction and Velocity

    I'm not insulted, it's alright. I took physics in high school, and now I'm trying to learn it with calculus, now that I've completed the class. Somehow I got the impression that plug-and-chug is not how you're supposed to do this stuff when calculus is brought into the equation. Maybe I'm...
  11. M

    Solving Work Energy Problems: Calculating Distance Using Friction and Velocity

    Since I'm trying to figure this out, allow me to type what I'm thinking here... hopefully you guys could point out where I'm going wrong: So since friction has absorbed the energy that was being used to move the block, my goal is to figure out the distance covered by whatever work the friction...
  12. M

    Solving Work Energy Problems: Calculating Distance Using Friction and Velocity

    Homework Statement A 30.0 kg box sliding at 5.00 m/s on a rough surface is brought to rest by 20.0 N of friction. What distance does the box slide? Homework Equations KE = 1/2*m*(v^2-v^2) The Attempt at a Solution I know that the change in velocity is 5.00 m/s since it is going to...
  13. M

    Find the equation from a graph

    edited out my answer because i wasn't aware of this rule. way to botch the first post in the forum, eh? well, to be more helpful without giving an answer: when you're looking at a graph, it really is rather simple... that purple one sure looks pretty basic, don't you think? pay attention to...
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