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.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.