Recent content by juyoung518

  1. J

    Can a demagnetized neodymium magnet be restored?

    Can a Neodymium magnet get back it's magnetic properties after being demangnetized? Say that there is a Neodymium magnet(Nd-Fe-B) that has been demagnetized(turned paramagnetic) at a temperature higher than its curie temperature. If I extract the demagnetized Neodymium(Nd) from the...
  2. J

    Using Peltier Plates for heating

    I know that peltier plates are for cooling(mostly :smile:) but I wish to try out heating other substances using peltier plates. I'm planning to use 3 peltier plates (TEC1-12712) [maximum temperature difference of 70 degrees measured at 25 degrees / Maximum temperature difference of 80 degrees...
  3. J

    Did the Object Change Direction When It Stopped?

    I'm trying to answer this question because it's a test problem... I need to hand it back till tomorrow. I need to prove my point that loss in direction means a change in direction...
  4. J

    Did the Object Change Direction When It Stopped?

    Yes! That's what I meant all along..
  5. J

    Did the Object Change Direction When It Stopped?

    I got a reply from a professor I know : Any opinions about this?
  6. J

    Did the Object Change Direction When It Stopped?

    Hmmm I learned at math class that 0 is not positive or negative. It's just 0 nothing more.
  7. J

    Did the Object Change Direction When It Stopped?

    What I am most troubled about is : Does the Direction Change in the Course of the object stopping(put at an absolute rest)? Like, The first vector is 4m/s to east and in the very moment the object stops, the vector changes to a null vector without a direction. In that very moment(the change of...
  8. J

    Did the Object Change Direction When It Stopped?

    Hi, this problem is making my head ache. Lets say that an object is moving at a decelerating speed(-1m/s) starting on 4m/s towards east and stopped after 4 seconds. (There are no friction.) After 4 seconds, the object would have 0 speed, no direction and 0 velocity etc. Question 1 : Is the...
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