1. The problem statement, all variables and given/known data A rock at the surface has a density of 2600kg(m^(-3) 90000m down its density is 3100kg(m^(-3) Change in pressure at the depth is due to hydrostatic pressure. Whats the bulk modulus of the rock? 2. Relevant equations Δp=p + ƿgh Δp=-B(ΔV/V) 3. The attempt at a solution Hydrostatic pressure: p(90000)= 1 x 10^(5) Pa + (3100kg(m^(-3))(9.81m/s^(2))(90000m) Δp= 2.74 x 10^(9) Pa Δp= - B(ΔV/V) So, (ΔV/V) => ΔV=m/ƿcompressed And V=m/ƿintital So the 2 m cancel and the expression for the bulk modulus is -B=Δp(ƿcompressed/ƿinitial) B= 3.3 x 10^(9) I think I may have made a slight misktake please help?