The Tryon Creek Wastewater Treatment Plant discharges an average of 8.3 million gallons per day into the Willamette River. Upstream of the discharge point, the Willamette River is 45 feet wide and 15 feet deep (on average), and the average velocity is 10 ft/s. Neglect density differences due to the wastewater. Determine: a. flow rate downstream of the discharge point (ft3/s)b. mass flow rate downstream of the discharge point (slugs/s)c. increase in width of the river downstream of the discharge point assuming depth and velocity do not change (ft)Hint: the cross-sectional shape of a shallow, wide river can be approximated as a rectang

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?