You are in a submarine and are at the surface of the ocean but out in the deep sea. there is a big storm and you want to dive down deep enough so that you avoid the turbulence of the sea. you notice the distance between successive waves (wave length) is 20 meters. how far down do you need to dive down to not feel the effect of the waves?

One of the maritime principles that relate the turbulence and wavelength of the waves is called the "depth of 1/2 wavelength" which is also usually referred to as the floor of the wave: A point of depth in which There is no movement. There if a submarine is found, it can be unbalanced and steadily navigate.

If the wavelength is 20 meters, then it must be submerged 10 meters (20/2) to avoid turbulence.

temp rises, and expansion

there are no contact forces mentioned on the list of choices that you've provided.