Problem 3 (3 points): Given a unity feedback system that has the forward transfer function Do the following: 1. Sketch the root locus; 2. Find the imaginary-axis crossing; 3. Find the gain, K, at the imaginary crossing; 4. Find the break-in and break away points; 5. Find the angle of departure from the complex poles.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit. explain why the pneumatic piston stumbles when it hits an obstacle.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?