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)

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody