A guitar string is vibrating at 255 Hz, but it is supposed to vibrate at 247 Hz. Should the tension be increased or decreased? By what percent should the tension be changed? [Percent change is (new value-old value)/old value.] Sketch the situation, defining all of your variables.

What physics equation(s) will you utilize in order to solve this problem? For each equation you list, give a justification for why it applies to this situation.

Apply your equation(s) to solve the problem as an algebraic expression(s).

Calculate your numerical answer(s). Show the units of your answer(s), and how you got them