Suppose that an ideal gas diesel engine comprises the following four processes: 1-2: polytropic compression with n = 9/7, p1 = 1.5 bar, p2 = 53 bar, v1/v2 = 16, v1 – v2 = 14 l 2-3: isobaric expansion, v3/v2 = 2.795 3-4: polytropic expansion with n = 9/7 4-1: isometric heat output (a) determine the unknown state variables, v1, v2, v3, v4, p3, and p4, (b) plot the p-v diagram on the axes provided. clearly label each state on the plot and clearly draw the path between each state.

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.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.