I was trying to find the compressibility of water and compressibility of air to compare. For compressibility of water I found 46.4e-6 For compressibility of a gas... I am having a tough time finding anything. compressibility factor I can find, which is 1 for Hydrogen... but how does that relate to compressibility? Also... if a liquid is much more viscous than water... water is .001[Pa*sec] so say if the viscosity = 2 then would it likely be more or less compressible than water?