Recent content by 2710

  1. 2

    Need help with Dynamo rule applied to coil and magnet:

    Hi, (I posted this on TSR as well, but they're being a bit slow...) Take the following setup: If you move the bar magnet left and right (a few cm) inside the coils, so that the ends do not leave the coil, will it induce a current/emf? I presume it does so, as I have been taught. But I don't...
  2. 2

    Understanding Field Theory: Finite Fields and Clock Arithmetic Explained

    Oh, lol, sorry for getting you worked up :P It is actually Galois' Field order 4 So, every F(2^(N)) Galois Field has the same table as F (subscript 2)? And yeh, I am just reading this book, I might take a full fledged course in the future :D Thanks, I guess Ill just have to take for...
  3. 2

    Understanding Field Theory: Finite Fields and Clock Arithmetic Explained

    Ok, sorry for me being a noob, but I am only high school standard ¬__¬ Anyways, say you have Z16, why can't this be a field? Let 16=i, u say that m*n = i, so 2x8 = 16. And 2x8 = 0 (modulo 16), and then you say fields are not allowed to have zero-divisors. But I am not dividing by zero... Also...
  4. 2

    Understanding Field Theory: Finite Fields and Clock Arithmetic Explained

    no! I haven't got the wrong table. I know that my tables aren't modulo 4 tables that's what I am saying. I don't care about modulo 4 tables. I want to know what MY tables are. In the book they say its a F4 table, but I don't understand what this means.
  5. 2

    Understanding Field Theory: Finite Fields and Clock Arithmetic Explained

    But they don't. If you look closely, 3+3 = 6 which is 2 modulo 4. But its 0 on my table. This isn't a modulo 4 table is it? Thanks
  6. 2

    Understanding Field Theory: Finite Fields and Clock Arithmetic Explained

    Hi, Can someone briefly explain Field theory to me? Ie, in this book, it says that 1+1 = 0 when field : F (subscript 2) And you can create a finite field for any prime number p. I don't understand this lol. I also got this table: + 0 1 2 3 0 0 1 2 3 1 1 0 3 2 2 2 3 0 1 3 3 2 1 0...
  7. 2

    Big O: Clarifying Prime Obsession Concepts

    oh yeh, forgot about that. Thanks! :D
  8. 2

    Big O: Clarifying Prime Obsession Concepts

    hi, I am reading Prime Obsession and john talks about Big o. He goes if Function A is trapped within + and - of function B then F(A) is Big O of F(B) So, y=Sin x is Big O of Y = 1 right? He also goes that if F(A) is Big O of F(B) then so is any multiple of F(A). so y=2sinx is also...
  9. 2

    Can someone explain zeros and zeta function for Riemann Hypothesis? (Yr13)

    Ok so I've read all of it. All I understand now is how non-trivial zeros converge at your starting point when you follow the rules. So, where is the critical 'strip' in these graphs? And how do these link to the primes? Apparently when you choose a correct value for T, it will bring you back to...
  10. 2

    Can someone explain zeros and zeta function for Riemann Hypothesis? (Yr13)

    Um...sorry lol, I don't really understand your post. The only book I've read so far is Marcus Du Sautoy's Music of the Primes. I've heard about Road to reality and how notoriously difficult it is to read (bearing in mind its length) Lol. But I will definitely give more books a shot. Thanks
  11. 2

    Can someone explain zeros and zeta function for Riemann Hypothesis? (Yr13)

    Hi, I'm Yr 13 and just wanted to do some further reading/exploring. So i understand that the zeta function is something to do with summing up like this: 1/ (1^s) + 1/(2^s) etc etc Now, I just want to know what are non-trivial zeros and trivial zeros? I just want to be able to understand this...
  12. 2

    Why Is the Buoyant Force Added to the Decelerating Force in Diving Physics?

    There is a diver of mass 72Kg who stands 2.4m away from the pivot of the diving board, 3.2m above the water. "The water brings the diver to rest when his centre of mass is 1.6 m below the surface of the water. Calculate the average total upward force acting on the diver which brings his...
  13. 2

    Why Does Voltage Change with a Constant Power Supply in a Rheostat Circuit?

    Ok thanks for all the help people o_0 I found out that the Long side is negative, so the rheostat is at the start not end, which explains a lot. Prob solved.
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