Angular frequency, phase velocity, and period

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1. The problem statement, all variables and given/known data
Given: angular frequency=2000pi
phase velocity=320m/s
period=? unknown


2. Relevant equations
f=w/2pi; w=omega. T=1/f. phase velocity = lambda/T

3. The attempt at a solution
i don't know what the sgnificance of the phase velocity is. this is because from 1/T = w/2pi, i can already compute the T=2pi/w or 1x10^-3. unfortunately, it s not in the choices. can someone help? thanks!
 
The phase velocity isn't important. If you have angular velocity (w) then you can always find T using T = 2pi/w.
 
131
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T=2pi/w or 1x10^-3. unfortunately, it s not in the choices. can someone help? thanks!
2pi/w should give piX10^03, not 1X10^-3.
 

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