1. The problem statement, all variables and given/known data In a ripple tank, you measure the speed of a wave to be 12 cm /s in the deep section and 9.0m/s in the shallow section. If the waves in the deep section that are 11.5 cm long cross over to the shallow section, what would be the wavelength in the shallow section 2. Relevant equations 3. The attempt at a solution I am not even sure how to start this question, how do i find the wavelength without frequency, and what exactly does this even question mean?