Air at 300 k and 100 kpa enters a two-stage compression system. each compressor triples the pressure, has a 90% isentropic efficiency, and operates adiabatically. a) what is the work required per unit –mass? b) what is the specific entropy generation in kj/kg-k?

Consider the transfer function for a first-order system g(s)=12(s+7)/(s^2+2s+9) for this system determine: a) poles and zeros of the function, b) the natural frequency and damping ratio, c) the peak value achieved in response to a unit step input, d) the peak time for a unit step input, e) the steady-state system response to a unit step input