An office building is served by an air-cooled chiller currently operating at 115 tons (404.5 kw). the measured chilled water supply temperature is 43°f (6.1°c), and the measured chilled water return temperature is 57°f (13.9°c). what is the estimated chilled water flow rate through the chiller? a. 172 gpm (10.9 l/s) b. 197 gpm (12.4 l/s) c. 212 gpm (13.4 l/s)

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.