In a test of rocket propellant performance, liquid hydrazine (n2h4) at 100 kpa, 25 °c, and oxygen gas (o2) at 100 kpa, 25 °c, are fed to a combustion chamber in the ratio of 0.4 kg o2 to 1 kg n2h4. the heat transfer from the chamber to the surroundings is estimated to be 200 kj per kmol of n2h4. assume that only gaseous h2o, h2, and n2 are present in the products. the enthalpy of formation of liquid hydrazine is +50,417 kj/kmol.

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.

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges