Physics
posted by Jenna .
A particular guitar string is supposed to vibrate at 220 , but it is measured to vibrate at 230 .
By what percent should the tension in the string be changed to correct the frequency?
I have been working for 7 hours of hw! Please help!

isnt v=sqrt(tension)
but f*lambda= v= sqrt(tension). So leaving the lambda constant, then f is proportional to sqrt tension
230/220= sqrt (tension/orgtension)
square both sides, solve for tension, then find the percent increase.