A drinking water treatment facility has a circular secondary clarifier with a 100-ft total diameter, a 10-ft water depth, and it treats 7 MGD (million gallons/day) of flow. Estimate the overflow rate (gpd/ft2) and the detention time (hr). What purpose does a secondary clarifier serve

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

What are the major differences between injection molding and extrusion?

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.