Ahydraulic cylinder has 6 inch diameter and 20 inch stroke using a hydraulic oil with a bulk modulus of 295,000 psi (0% air, and 80 f). find the percent change in the volume of oil if the system operates at 6,000 psi (note, 6,000 psi is a really high, but not rare, pressure for a system). real fluid power system -- the fluid heats in the system and the air entrapment in the fluid reduces the oil bulk modulus to 66,000 psi (1 to 2% air, and 180°f). find the percent change in the volume of oil if the system still operates at 6,000 psi.