Problem
A 724-Hz longitudinal wave in air has a speed of 345 m/s. What is the wavelength of this wave? How much time is requred for the phase to change by 90° at a given point in space? At a particular instant, what is the phase difference (in degrees) between two points 4.4 cm apart? Sketch the situation, defining all of your variables. Include a graph of y(x,t=0).
1) 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.
2) Apply your equation(s) to solve the problem as an algebraic expression(s).
3) Calculate your numerical answer(s). Show the units of your answer(s), and how you got them.