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1.A person on the moon wishes to determine the mass of a rock. He has a spring scale calibrated to read pounds mass at a location where the acceleration of gravity is 32.186 ft/s 2 . The rock gives a reading of 18.76 on this scale. The acceleration of gravity on the moon is 5.32 ft/s 2 . What is the weight of the rock on the moon?
2.A two thousand gallon tank has two influent streams. Influent one has a flow of 20 GPH and a salt concentration of 100 mM; influent two has a glow of 15 GPH and a salt concentration of 200 mM. What is the steady-state concentration of salt in the tank. Assume volumetric steady-state and that the system is well mixed.
3.Determine A_x and A_y, joint A's reaction forces' magnitudes in the x and y directions, respectively, and C_y, joint C's reaction force's magnitude in the y direction.
A rigid beam (AB), 12 feet in length, with a point load of 9 kips (4 feet from A) is resting on two short steel rods (AC & BD). Diameter of Rod AC is 1 inch, Rod BD diameter is 2 inches. Assuming no buckling in rods, Determine the displacement of the..
A 5000 m3/day wastewater treatment plant discharges to a river with a minimum drought flow of 140 m3/min (upstream of outfall) a)What total allowable BOD (kg/day) could be discharged by the plant if the BOD in the river after initial dilution must ..
A sedimentation basin is used to remove suspended solids from a wastewater. The rate of flow of wastewater into the tank is 10 L/s, and the influent concentration of suspended solids is 200 mg/L.
Evaluate the spread and depth at the curb for a triangular gutter section carrying a design discharge of 0.09m3/s and having a uniform cross slope of 0.022m/m, Manning’s roughness of 0.015, and longitudinal slope of 0.014m/m.
Water enters a two-armed lawn sprinkler along the vertical axis (normal to the page) at a rate of 80 L/s and leaves the sprinkler nozzles as 1.5-cm diameter jets at an angle of from the tangential direction.
Using the following assumptions, determine the solids retentiontime, the cell wastage flow rate, and the return sludge flow ratefor the Jambalaya shrimp processing plant WWTP.
A supervisor is sitting at her desk illuminated by a 180 candela source 3 feet above it. She is writing with green ink (reflectance=30%) on a yellow note pad (reflectance=60%). What is the illumination on the note pad
The maximum specific growth rate of the organisms driving this reaction is 5.0 days -1 and the growth rate is 0.54 day-1. The activated sludge tank has a volume of 40 m3 and the flow rate into it is 400 m3/day.
Describe mathematically and explain the Principle of Angular Impulse and Momentum ? What is Conservation of Angular Momentum and how is it related?
The pressure at the entrance of the system must be at least 75 psi and the demand is 1350 GPM. The pipe material is to be riveted steel and the length of pipe is 5,000 feet. What size pipe should be used
E on roads extending east and west and S on roads extending north and south.Those roads traveling east and west are designated a number and the letter E.
The magnetic declination at a certain place is 12 degree 6 minutes W.What is the magnetic bearing there (a) of true north (b) of true south and (c) of true west?
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