Determine the effluent concentrations of S, Xa, Xi, Xv, and X (the total suspended solids) for a 10 m³ reactor operated as a chemostat that is fed 3 m³/d of wastewater containing BOD_L of 2,000 mg/l, 20 mg/l of nonbiodegradable suspended organic solids, and 15 mg/l of inorganic suspended solids.
Assume aerobic conditions exist and that Y= 0.65 mg cells/mg BOD_L, q^ = 16 mg BOD_L/d per mg cells, K = 25 mg/l, b = 0.2/d, and f_d = 0.8.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?