1. The problem statement, all variables and given/known data When water freezes it expands by about 9.00% What pressure increase would occur inside your automobile engine block if the water in it froze? ( The bulk modulus of ice is 2.00*10^9 N/m^2 2. Relevant equations Bulk modulus = ΔPressure/(ΔVolume/Initial Volume) 3. The attempt at a solution Let V initial= V, V final = 1.09 V ΔP= 2*10^9*(0.009/1) I know that somehow V initial must be 1.09 in order to get the correct answer. I just don't understand why ?