# Zwiebach Exercise 9.3e

1. Oct 6, 2007

### ehrenfest

1. The problem statement, all variables and given/known data
I can relate tau and X0 by:

$$\tau = \frac{X^0}{2 \sqrt{2} \alpha' p^+ }$$

Why does that mean the angular frequency is

$$\frac{1}{2 \sqrt{2} \alpha' p^+ }$$

?

2. Relevant equations

3. The attempt at a solution

2. Oct 6, 2007

### Jimmy Snyder

Take this and plug it into the equations for $X^{(2)}$ and $X^{(3)}$.