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  1. J

    Coefficent of friction for a box moving at cosntant speed

    a = 0? so it means they are the same force?? So it means all we need is to use the Ff equation now.
  2. J

    Coefficent of friction for a box moving at cosntant speed

    Homework Statement A horizontal force fo 190N is needed to pull a 70kg box across a horizontal floor at a constant speed. What is the coefficent of friction between the box and the floor? Homework Equations Fnet = ma The Attempt at a Solution My setup is F - F_f = m*a But I...
  3. J

    Find the final temperature of water

    Thanks. But if all Qs are negative, unknown delta T is x = 13.6575 It is still above the boiling point though. I thought it was safe to assume that it is no longer steam, but water, fully in liquid form.\\ Here is my setup -423000 = (-2260 * 175g) + (-2.0 * 50 *175) + (-4.184 * 175 * x) x =...
  4. J

    Find the final temperature of water

    Homework Statement What is the final temperature of water if 175 g steam at 150 C loses 423 KJ of energy? Homework Equations Q = M *C_p * Δ T Q = m * heat of (phase_change) The Attempt at a Solution This is how I would go about solving this problem. Going from steam to water requires...
  5. J

    Prove absorption law

    Homework Statement Prove the absorption law A U (A and B) = A Homework Equations The Attempt at a Solution I need to prove the sets are equal. I don't know how to prove the right hand as a subset of the left hand. For left hand as subset of right hand, it's pretty simple (we can define...
  6. J

    Computer Engineering Vs Computer Science

    I can't believe that when I find this thread through Google someone has made new response. I actually need to decide between CpE and CS, since I am a raising Junior. I used to think that CpE will give you the a very good overview of how digital system operate, and it was the reason that put me...
  7. J

    GPA: Can you be too perfect?

    Good point. Social norm. But does your statement imply that you would in a room for 18 hours 7 days a week?
  8. J

    Schools Does anyone know which college math course uses conics the most?

    Conic... as you've mentioned: parabola. I think you have learned about parabola in high school. Maybe not every property because the main purpose of high school education is to provide a general overview of mathematics to the students, so proofs and stating every property may not be all that...
  9. J

    GPA: Can you be too perfect?

    Your username fits this... viscosity. Haha. Yeah. Grade inflation is a common problem, but as long as you have a high, consistent GPA....
  10. J

    Learning Python

    I don't have any experiences with either book. IMO you should always start with C++. It's just a personal view that it is better to attack the common programming stuff and then go to a more laid-back rapid development type programming language (Python can be quite weird to an experienced...
  11. J

    GRE Vocabulary List Helpful?

    I see. But from what I understand if you can't do well on your general even with excellent scores on your subject your chance will be a lot lower...
  12. J

    What are your feelings about long gaps between classes & waiting on campus

    I second this. 10 hours of gap. Definitely get an on-campus job.... at least take out 3 hours.
  13. J

    How can I maintain my motivation to solve problems?

    Man. Stop picking on my poor performance :[ . I know. It's an effort. :tongue:
  14. J

    How can I maintain my motivation to solve problems?

    Interesting suggestion. This can really lead to a good result. If you arrange a study group with the classmates / friends, it is your responsibility to do the homework ASAP, and expect to help each other out. The chatting part can consume time, and should avoid as much as possible. But if you...
  15. J

    Worried About Physics

    It's good... keep for aiming for A. But please also lower your expectation. It's always good to have a goal, but sometime reality just doesn't ..... WILL NOT SETTLE can turn against you later. The right way is probably "I will not stop aiming for A" Me.. But it is never too late to do the...
  16. J

    Which programming language is best?

    There is no such thing as best programming language. You cans simply google "best programming language". You choose the language based on your needs. Python is popular for rapid development, over Java and C++. There are many languages out there. You certainly don't want to write a website using...
  17. J

    How can I maintain my motivation to solve problems?

    Stay in the library. Find a place where you can't really use computer except if you make a effort to walk to the computer section.
  18. J

    Other Should I Become a Mathematician?

    Maybe you can find these books at your school library / local library. You'd be surprised I'd say here http://www.regentsprep.org/regents/math/geometry/math-GEOMETRY.htm Just pick up a high school geometry book. There is nothing more simpler than a pre book.
  19. J

    Very restricted in undergrad options, need advice!

    Your PhD won't make you rich. It's a miserable thing that so many people are going to PhD because they think it makes them smarter and more valuable. Programmers don't really need BS. But if you want to work for a big company, yeah, sure you need a BS. It's a requirement. I think for most...
  20. J

    Have you guys ever written an article in your undergrad math class?

    It's only a sample. You have to decide what to write. I am not sure why the sample article includes those scientific facts, but the paragraphs that deals with the solution is not bad at all. It can be done much shorter. No doubt. You have to consult with the instructor to find about what is...
  21. J

    Have you guys ever written an article in your undergrad math class?

    If you are taking ODE, don't be overwhelm by the writing requirements. The ODE sample looks pretty straightforward. Solve the ODE and describe what is going on, although the sample article goes a little bit more by providing the scientific facts of the equation. I like the idea that you get to...
  22. J

    Contemplating between computer sciences and electronics!

    I am not sure how much you can get out of a computer science class at the moment. Personally I need to enter a class because it is the only way to test my knowledge. I still read and learn outside the classroom. Scientific computing? Look into applied mathematics (with computational...). You...
  23. J

    Very restricted in undergrad options, need advice!

    That being said, if OP has obligations that keep him from attending a class physically, what is the odd that he will be able to get an internship? I know internship is not all that necessary, but consider how many new EE graduates are added to the market each year. I'd say OP has to sort out the...
  24. J

    Very restricted in undergrad options, need advice!

    What about community college? Soon or later you would need to get into a physical class. I honestly don't see how it is to become an EE if you haven't done the laboratory part physically. I understand your situation - you have obligations which hinder you from going to a school. But if you...
  25. J

    Recommended Software Language to Learn?

    For beginner it can be quite difficult to use the documentation. Nnonetheless a beginner should use the documentation as much as possible. I don't like the Java documentation, but Python's is excellent. PS: If you are going to do android, please take caution when you are reading the official...
  26. J

    Computational mathematics for a messed up student

    Hi, Fizex. Thanks for joining me here. My GPA is still around 3.2.... but those Cs just make me go urgh I came to US when I was 12, and for the next four years I was basically learning the same materials over and over. At college, as a Computer Engineering major, I would need to take the math...
  27. J

    Courses Which order to take math courses?

    I will correct myself. I meant "first semester of physics". :]typo
  28. J

    Courses Which order to take math courses?

    I would leave differential at the end of the calculus sequence. I don't see the hurry for differential... it can confuse you if you take differential somewhere in the middle of your calculus sequence. As far as first semester of calculus, you probably don't need anything other than the concepts...
  29. J

    Computational mathematics for a messed up student

    any advice, please? Thanks.
  30. J

    Recommended Software Language to Learn?

    I don't really have any favorite Python book because the language is so WEIRD.... I just go through the basics and try to convert any existing C++ programs I've written into Python... You have a lot of time. Learn a new language is not the most difficult thing. Switching back and forth and...
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