1. The problem statement, all variables and given/known data "Sound travels faster in water than in air. In our experiment, which aspects of velocity, wavelength and frequency changed when part of the sound traveled through the water? If the speed in water is faster by a factor of four, by how much did the wavelength and the frequency change?" 2. Relevant equations velocity = wavelength x frequency 3. The attempt at a solution The velocity I averaged out from the experiment was 309m/s (I know it's far off, but that's not the issue right now). I assumed I would use v=wavelength x frequency, but I only know one of the variables, because it said that both wavelength and frequency changed.