Recent content by Xizel

  1. X

    (Number theory) Sum of three squares solution proof

    If my logic is correct, then x, y, z can take on values of 1, 3, 5, 7. I gave it some thought and I'm not seeing it :nb)
  2. X

    (Number theory) Sum of three squares solution proof

    Homework Statement Find all integer solutions to x2 + y2 + z2 = 51. Use "without loss of generality." Homework Equations The Attempt at a Solution My informal proof attempt: Let x, y, z be some integers such that x, y, z = (0 or 1 or 2 or 3) mod 4 Then x2, y2, y2 = (0 or 1) mod 4 So x2 +...
  3. X

    Proof of KE loss in inelastic collision

    Homework Statement Prove that a perfectly inelastic collision loses more kinetic energy than a partially inelastic collision. Given: $$m_1, m_2, v_{1i}, v_{2i}, v_{1f}, v_{2f}$$ Homework Equations $$KE = \frac{1}{2}mv^2$$ The Attempt at a Solution From conservation of momentum...
  4. X

    How Do You Calculate the Uncertainty in the Derivative of y = a / (x - b)^3?

    y = a / (x - b)3 a = 77.1 ± 15.2 b = -1.78 ± 1.18 x = 21 ± 1 --- y' = -3a / (x - b)4 How do I find the uncertainty of y'? Thanks.