Recent content by aschulz90

  1. A

    Short easy question, what does this sort of plus minus symbol mean?

    Found an answer on wikipedia: There is another character, the minus-plus sign (∓) which is seen less often. It is generally used in conjunction with the "±" sign, in such expressions as "x ± y ∓ z", which can be interpreted as meaning "x + y − z" or/and "x − y + z", but not "x + y + z" nor "x −...
  2. A

    Short easy question, what does this sort of plus minus symbol mean?

    I'm studying for a quantum exam and there is this symbol that looks like an inverted plus minus but the minus is attached to the plus... kind of like _ + but attached. in context: "x ± vt = constant or x = (-/+) + constant." Thanks for any speedy help!
  3. A

    Question 1.7 Griffiths Introduction to Quantum Mechanics (2nd Edition)

    Calculate d<p>/dt Answer: d<p>/dt = <-dV/dx> generally speaking (I believe) you need to use scrodinger's equation (both of dphi/dt and dphi*/dt) and the expectation value of momentum: <p> = -i*h_bar * integral (phi* * dphi/dx) dx. I would say that the way I used Cramster was just short of...