A piston-cylinder assembly undergoes expansion processes between P1 = 3 bar, ∀1 = 0.1 m3 to ∀2 = 0.2 m3 . Compare the ending pressure and the amount of work if the process follows the following rules: 1. P = constant. (Polytropic with n = 0) 2. Polytropic, n = 1. 3. Polytropic, n = 1.5. 4. Polytropic, n = 5. A couple necessary details before starting. 1 bar = 100 kPa, which is within 1.3% of 1 atmosphere. When calculating P d∀ work, having pressure in kPa and volume in m3 will result in work in kJ. If the pressure is left in bar, the work needs to be multiplied by 100 correct the result to kJ

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

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.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.