An industrial outlet is discharging a 1.8 m/s waste stream with a BOD of 20 mg/L and a DO concentration of 1.5 mg/L into a river with a flow of 70 mº/s that contains 0.51 mg/L BOD and has an existing oxygen deficit of 1.2 mg/L If the saturated DO concentration is 9.50 mg/L, what is the initial deficit D. (mg/). In the Oxygen Sag Model for this situation? a. 1.37 mg/L
b. 1.0 mg/l
c. 1.2 mg/L
d. 8.0 mg/L

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

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.

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure