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Waste water is dischared into a aquifer. This waste water contains 0.1 ppm atrazine (a common herbicide). The MCL of atrazine is 5 ppb, the density is 1.19 g/ML and the solubility is 50 ppm.
the water is pumped out of the aquifer at a rate of 2000 gpd, treat it with activated carbon and then put it back into the aquifer. At the flow rate how long until al the PCE is removed, assume carb
A bowstring produces a force against a 2.0 oz arrow given by where a = 40 lbf, b = 3.2 ft-1 and x is in ft. x = 0 when the arrow is pulled fully back and increases as the arrow moves forward.
A water storage tank located on a larege dairy farm has a storage capacity of 0.1 ML. The average rate of water consumption from this tank is 6.25 kL per day, every day. The farmer refills the tank
A person of mass 80kg places all their weight on the pedal of a foot operated hydraulic jack. The diameter of the hydraulic cylinder under foot pedal is 4cm and the diameter of the jack cyclinder is
The undercarriage for an aircraft uses two springs between each wheel and the aircraft fueselage to cuhion the landing of the aircraft. There are two sprung wheels and the mass of the aircraft is 50
A container of petrol on a set of scales is used to measure the rate at which fuel is used by an engine under test. In one test the weight measured by the scales decreases by 25.0 N in 1 hour.
A room 7m x 6m x 3m high is to be electically heated to maintain the inside temperature at 20 C, when it is 0 C outside. The room has 2 windows each 1.2m x 1.8m and a sliding glass door 2.4m x 2.1m.
During frequent braking under race conditions the disk brake rotors on the car described above reach a temperature of 500C. These disk brakes rely on forced convection to cool them. The dimensions o
how many students have heights (a) greater than 72 inches, (b) less than or equal to 64 inches, (c) between 65 and 71 inches inclusive, (d) equal to 68 inches. Assume the measurements to be recorded
he City of Leeds (England) discharges about 1.4 m3/sec to the Aire River. Without the wastewater discharge, the river flow rate would be 12.7 m3/sec. Given that BOD(river) = 3.0 mg/L and BOD(wastewa
A particle travels along a straight line with a constant acceleration. When s=4ft, v=3ft/s and when s=10ft, v=8ft/s. Determine the velocity as a function of position.
Consider high pressure steam at 400 degrees C and v =0.01567 m^3/kg. Obtain estimates of the pressure using (a) the van der Waals equation (b) the redlich-kwong equation. The actual pressure is 150
Atmospheric air is at 101 kPa (abs) and 25 degrees C. Determine (a) the density of the air (b) the molar specific volume of the air. Work out problem completely please. I already have the answers a)
A sprinkler system uses an outdoor reservoir at El 50. A fire pump moves Q = 3 ft^3/sec through a 1.0' dia pipe 300' long to an 8" dia main at El 200. To distribute water to sprinklers, a pressure h
A hi-vol clean filter weighs 18.00 g. After a 24 hour sampling period the filter is removed and weighs 18.65 g. The initial flow rate through the filter was 2.5 m3/min.
An activated sludge system treats 1500 m3/day of raw wastewater with a BOD of 250 mg/L. The reactor volume is 375 m3. The kinetic parameters were determined to be: x = 3 day-1, Y = 0.55 kg SS/kg cel
A flow of 125,000 gallons per day enters a sedimentation basin which is 20 feet wide, 60 feet long and 12 feet deep. What is the minimum settling velocity of a particles that will be 100% removed by
If the effective stack height of the plant is 100 m, and the ground reflects the SO2 emission perfectly what is the SO2 concentration at a sampling point located 2 m above the ground in the town.
a spherical pressure vessel has an outer diameter of 10 ft and a wall thickness of 0.5 in. knowing that for the steel used ?all= 12 ski, E= 29 x 10^6 psi, and v= 0.29, determine (a) the allowable ga
The coefficient of static friction between each crate and the ground is 0.25 The crates are next to each other connected by a rope and then from the other end one has a P force going up at an angle
A car moves around a curved path that has a radius of 375 feet. While moving around the arced path, the car increases speed by 1.15 ft/s^2. If the car starts from rest, determine the time needed to r
Write a computer program that can be used to determine the internal shear and moment at any specified location x along the beam, and plot the shear and moment diagrams for the beam.
What would be the reading on a barometer containing Benzene at 20 degrees Celsius at a time when the atmospheric pressure was equivalent to 12.3 m of water
Simply Supported Reinforced Concrete Beams - Explain the purpose and amount of reinforcing in concrete beams in relation to bending and shear and the concepts of under reinforcement, balanced reinfo